./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix016_power.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix016_power.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 23:22:58,904 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:22:58,978 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:22:58,984 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:22:58,985 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:22:59,015 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:22:59,016 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:22:59,016 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:22:59,017 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:22:59,021 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:22:59,021 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:22:59,021 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:22:59,022 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:22:59,024 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:22:59,024 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:22:59,024 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:22:59,025 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:22:59,025 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:22:59,025 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:22:59,025 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:22:59,026 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:22:59,026 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:22:59,026 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:22:59,027 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:22:59,027 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:22:59,027 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:22:59,028 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:22:59,028 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:22:59,028 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:22:59,029 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:22:59,030 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:22:59,030 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:22:59,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:22:59,030 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:22:59,030 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:22:59,031 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:22:59,031 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:22:59,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:22:59,031 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:22:59,031 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:22:59,032 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:22:59,032 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:22:59,032 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:22:59,032 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:22:59,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:22:59,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:22:59,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:22:59,324 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:22:59,325 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:22:59,326 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i [2024-06-27 23:23:00,464 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:23:00,722 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:23:00,727 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i [2024-06-27 23:23:00,744 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf13032ab/f6d772926b0e428c90b788591f9ee3d5/FLAG12f4f25d7 [2024-06-27 23:23:00,756 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf13032ab/f6d772926b0e428c90b788591f9ee3d5 [2024-06-27 23:23:00,757 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:23:00,758 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:23:00,758 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix016_power.opt_rmo.opt.yml/witness.yml [2024-06-27 23:23:00,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:23:00,828 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:23:00,829 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:23:00,829 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:23:00,834 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:23:00,834 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:23:00" (1/2) ... [2024-06-27 23:23:00,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a5e19f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:23:00, skipping insertion in model container [2024-06-27 23:23:00,835 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:23:00" (1/2) ... [2024-06-27 23:23:00,837 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@68601219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:23:00, skipping insertion in model container [2024-06-27 23:23:00,837 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:23:00" (2/2) ... [2024-06-27 23:23:00,837 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a5e19f4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:23:00, skipping insertion in model container [2024-06-27 23:23:00,838 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:23:00" (2/2) ... [2024-06-27 23:23:00,838 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:23:00,865 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:23:00,867 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (0LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )__unbuffered_p0_EAX - (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-27 23:23:00,867 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (0LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )__unbuffered_p0_EAX - (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-27 23:23:00,868 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (0LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )__unbuffered_p0_EAX - (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-27 23:23:00,868 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:23:00,868 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-27 23:23:00,920 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:23:01,251 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:23:01,270 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:23:01,490 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:23:01,542 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:23:01,543 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:23:01 WrapperNode [2024-06-27 23:23:01,543 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:23:01,544 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:23:01,544 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:23:01,544 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:23:01,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:23:01" (1/1) ... [2024-06-27 23:23:01,571 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:23:01" (1/1) ... [2024-06-27 23:23:01,612 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-27 23:23:01,612 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:23:01,613 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:23:01,613 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:23:01,613 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:23:01,624 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:23:01" (1/1) ... [2024-06-27 23:23:01,624 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:23:01" (1/1) ... [2024-06-27 23:23:01,629 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:23:01" (1/1) ... [2024-06-27 23:23:01,646 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 23:23:01,647 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:23:01" (1/1) ... [2024-06-27 23:23:01,647 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:23:01" (1/1) ... [2024-06-27 23:23:01,657 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:23:01" (1/1) ... [2024-06-27 23:23:01,659 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:23:01" (1/1) ... [2024-06-27 23:23:01,662 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:23:01" (1/1) ... [2024-06-27 23:23:01,664 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:23:01" (1/1) ... [2024-06-27 23:23:01,668 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:23:01,669 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:23:01,669 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:23:01,670 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:23:01,670 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:23:01" (1/1) ... [2024-06-27 23:23:01,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:23:01,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:23:01,766 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 23:23:01,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 23:23:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:23:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:23:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:23:01,855 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:23:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:23:01,855 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:23:01,856 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 23:23:01,856 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 23:23:01,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:23:01,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:23:01,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:23:01,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:23:01,858 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 23:23:01,997 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:23:01,999 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:23:02,514 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:23:02,515 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:23:02,721 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:23:02,721 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:23:02,722 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:23:02 BoogieIcfgContainer [2024-06-27 23:23:02,722 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:23:02,725 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:23:02,725 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:23:02,728 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:23:02,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:23:00" (1/4) ... [2024-06-27 23:23:02,729 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff22b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:23:02, skipping insertion in model container [2024-06-27 23:23:02,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:23:00" (2/4) ... [2024-06-27 23:23:02,730 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff22b9c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:23:02, skipping insertion in model container [2024-06-27 23:23:02,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:23:01" (3/4) ... [2024-06-27 23:23:02,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff22b9c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:23:02, skipping insertion in model container [2024-06-27 23:23:02,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:23:02" (4/4) ... [2024-06-27 23:23:02,733 INFO L112 eAbstractionObserver]: Analyzing ICFG mix016_power.opt_rmo.opt.i [2024-06-27 23:23:02,748 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:23:02,748 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 23:23:02,748 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:23:02,798 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:23:02,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 23:23:02,866 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 23:23:02,867 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:23:02,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:23:02,870 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 23:23:02,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 23:23:02,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:23:02,896 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6edbfa3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:23:02,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 23:23:02,902 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:23:02,902 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 23:23:02,902 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:23:02,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:02,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:23:02,903 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:02,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:02,911 INFO L85 PathProgramCache]: Analyzing trace with hash 365436942, now seen corresponding path program 1 times [2024-06-27 23:23:02,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:02,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289244623] [2024-06-27 23:23:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:02,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:04,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:04,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289244623] [2024-06-27 23:23:04,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289244623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:04,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:04,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:23:04,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224987331] [2024-06-27 23:23:04,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:04,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:23:04,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:04,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:23:04,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:23:04,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-27 23:23:04,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:04,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:04,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-27 23:23:04,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:04,915 INFO L124 PetriNetUnfolderBase]: 946/1551 cut-off events. [2024-06-27 23:23:04,916 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 23:23:04,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3057 conditions, 1551 events. 946/1551 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7745 event pairs, 638 based on Foata normal form. 1/1490 useless extension candidates. Maximal degree in co-relation 3045. Up to 1431 conditions per place. [2024-06-27 23:23:04,932 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 30 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 23:23:04,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 167 flow [2024-06-27 23:23:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:23:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:23:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-27 23:23:04,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-27 23:23:04,945 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 79 transitions. [2024-06-27 23:23:04,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 167 flow [2024-06-27 23:23:04,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:23:04,951 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 23:23:04,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 23:23:04,956 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 23:23:04,956 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 23:23:04,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:04,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:04,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:04,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:23:04,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:04,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:04,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1002400659, now seen corresponding path program 1 times [2024-06-27 23:23:04,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:04,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177662923] [2024-06-27 23:23:04,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:04,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:06,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:06,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177662923] [2024-06-27 23:23:06,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177662923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:06,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:06,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:23:06,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758512566] [2024-06-27 23:23:06,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:06,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:23:06,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:06,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:23:06,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:23:06,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-27 23:23:06,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:06,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:06,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-27 23:23:06,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:06,445 INFO L124 PetriNetUnfolderBase]: 1110/1752 cut-off events. [2024-06-27 23:23:06,446 INFO L125 PetriNetUnfolderBase]: For 339/339 co-relation queries the response was YES. [2024-06-27 23:23:06,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3973 conditions, 1752 events. 1110/1752 cut-off events. For 339/339 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8522 event pairs, 641 based on Foata normal form. 3/1752 useless extension candidates. Maximal degree in co-relation 3961. Up to 1652 conditions per place. [2024-06-27 23:23:06,458 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 38 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-27 23:23:06,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 236 flow [2024-06-27 23:23:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:23:06,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:23:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-27 23:23:06,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 23:23:06,461 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 100 transitions. [2024-06-27 23:23:06,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 236 flow [2024-06-27 23:23:06,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:23:06,463 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-27 23:23:06,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 23:23:06,464 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-27 23:23:06,464 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-27 23:23:06,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:06,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:06,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:06,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:23:06,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:06,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:06,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1009648785, now seen corresponding path program 1 times [2024-06-27 23:23:06,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:06,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625604376] [2024-06-27 23:23:06,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:06,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:08,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:08,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625604376] [2024-06-27 23:23:08,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625604376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:08,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:08,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:23:08,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559483688] [2024-06-27 23:23:08,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:08,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:23:08,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:08,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:23:08,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:23:08,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-27 23:23:08,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:08,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:08,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-27 23:23:08,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:08,768 INFO L124 PetriNetUnfolderBase]: 1104/1745 cut-off events. [2024-06-27 23:23:08,768 INFO L125 PetriNetUnfolderBase]: For 954/954 co-relation queries the response was YES. [2024-06-27 23:23:08,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4419 conditions, 1745 events. 1104/1745 cut-off events. For 954/954 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8500 event pairs, 517 based on Foata normal form. 3/1745 useless extension candidates. Maximal degree in co-relation 4405. Up to 1628 conditions per place. [2024-06-27 23:23:08,780 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 45 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-27 23:23:08,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 314 flow [2024-06-27 23:23:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:23:08,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:23:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-27 23:23:08,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 23:23:08,783 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 123 transitions. [2024-06-27 23:23:08,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 314 flow [2024-06-27 23:23:08,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 300 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 23:23:08,786 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 172 flow [2024-06-27 23:23:08,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-27 23:23:08,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-27 23:23:08,787 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 172 flow [2024-06-27 23:23:08,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:08,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:08,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:08,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:23:08,788 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:08,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:08,789 INFO L85 PathProgramCache]: Analyzing trace with hash -471107276, now seen corresponding path program 1 times [2024-06-27 23:23:08,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:08,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683671599] [2024-06-27 23:23:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:08,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:10,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:10,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683671599] [2024-06-27 23:23:10,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683671599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:10,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:10,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:23:10,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475732449] [2024-06-27 23:23:10,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:10,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:23:10,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:10,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:23:10,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:23:10,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-27 23:23:10,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:10,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:10,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-27 23:23:10,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:11,219 INFO L124 PetriNetUnfolderBase]: 1095/1728 cut-off events. [2024-06-27 23:23:11,219 INFO L125 PetriNetUnfolderBase]: For 1758/1758 co-relation queries the response was YES. [2024-06-27 23:23:11,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4812 conditions, 1728 events. 1095/1728 cut-off events. For 1758/1758 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8436 event pairs, 375 based on Foata normal form. 6/1731 useless extension candidates. Maximal degree in co-relation 4797. Up to 1583 conditions per place. [2024-06-27 23:23:11,230 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 49 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-27 23:23:11,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 68 transitions, 368 flow [2024-06-27 23:23:11,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:23:11,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:23:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 23:23:11,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-27 23:23:11,235 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 172 flow. Second operand 6 states and 142 transitions. [2024-06-27 23:23:11,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 68 transitions, 368 flow [2024-06-27 23:23:11,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 68 transitions, 344 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:23:11,241 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 191 flow [2024-06-27 23:23:11,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=191, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-06-27 23:23:11,243 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-27 23:23:11,243 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 191 flow [2024-06-27 23:23:11,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:11,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:11,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:11,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:23:11,244 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:11,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:11,245 INFO L85 PathProgramCache]: Analyzing trace with hash 292940758, now seen corresponding path program 1 times [2024-06-27 23:23:11,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:11,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206174022] [2024-06-27 23:23:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:11,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:12,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:12,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206174022] [2024-06-27 23:23:12,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206174022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:12,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:12,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:23:12,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239650816] [2024-06-27 23:23:12,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:12,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:23:12,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:12,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:23:12,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:23:12,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 23:23:12,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 191 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:12,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:12,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 23:23:12,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:13,073 INFO L124 PetriNetUnfolderBase]: 920/1574 cut-off events. [2024-06-27 23:23:13,074 INFO L125 PetriNetUnfolderBase]: For 2263/2263 co-relation queries the response was YES. [2024-06-27 23:23:13,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4511 conditions, 1574 events. 920/1574 cut-off events. For 2263/2263 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8114 event pairs, 378 based on Foata normal form. 2/1567 useless extension candidates. Maximal degree in co-relation 4494. Up to 1382 conditions per place. [2024-06-27 23:23:13,087 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 40 selfloop transitions, 10 changer transitions 0/57 dead transitions. [2024-06-27 23:23:13,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 57 transitions, 343 flow [2024-06-27 23:23:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:23:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:23:13,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 23:23:13,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 23:23:13,089 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 191 flow. Second operand 6 states and 116 transitions. [2024-06-27 23:23:13,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 57 transitions, 343 flow [2024-06-27 23:23:13,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 308 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 23:23:13,096 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 221 flow [2024-06-27 23:23:13,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-27 23:23:13,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-27 23:23:13,099 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 221 flow [2024-06-27 23:23:13,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:13,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:13,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:13,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:23:13,105 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:13,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:13,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1957448587, now seen corresponding path program 1 times [2024-06-27 23:23:13,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:13,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096526645] [2024-06-27 23:23:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:13,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:14,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:14,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096526645] [2024-06-27 23:23:14,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096526645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:14,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:14,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:23:14,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306336951] [2024-06-27 23:23:14,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:14,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:23:14,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:14,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:23:14,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:23:14,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:23:14,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:14,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:14,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:23:14,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:15,029 INFO L124 PetriNetUnfolderBase]: 1113/1776 cut-off events. [2024-06-27 23:23:15,029 INFO L125 PetriNetUnfolderBase]: For 3783/3783 co-relation queries the response was YES. [2024-06-27 23:23:15,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5618 conditions, 1776 events. 1113/1776 cut-off events. For 3783/3783 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8659 event pairs, 449 based on Foata normal form. 2/1773 useless extension candidates. Maximal degree in co-relation 5598. Up to 1641 conditions per place. [2024-06-27 23:23:15,042 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 47 selfloop transitions, 17 changer transitions 0/70 dead transitions. [2024-06-27 23:23:15,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 70 transitions, 433 flow [2024-06-27 23:23:15,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:23:15,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:23:15,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-27 23:23:15,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-27 23:23:15,044 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 221 flow. Second operand 6 states and 121 transitions. [2024-06-27 23:23:15,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 70 transitions, 433 flow [2024-06-27 23:23:15,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 70 transitions, 409 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 23:23:15,050 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 295 flow [2024-06-27 23:23:15,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-27 23:23:15,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-27 23:23:15,053 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 295 flow [2024-06-27 23:23:15,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:15,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:15,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:15,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:23:15,054 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:15,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:15,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1619267107, now seen corresponding path program 2 times [2024-06-27 23:23:15,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:15,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134583221] [2024-06-27 23:23:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:15,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:16,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:16,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134583221] [2024-06-27 23:23:16,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134583221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:16,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:16,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:23:16,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829791778] [2024-06-27 23:23:16,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:16,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:23:16,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:16,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:23:16,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:23:16,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:23:16,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 295 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:16,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:16,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:23:16,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:17,055 INFO L124 PetriNetUnfolderBase]: 1124/1808 cut-off events. [2024-06-27 23:23:17,055 INFO L125 PetriNetUnfolderBase]: For 5210/5216 co-relation queries the response was YES. [2024-06-27 23:23:17,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6167 conditions, 1808 events. 1124/1808 cut-off events. For 5210/5216 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8889 event pairs, 448 based on Foata normal form. 6/1807 useless extension candidates. Maximal degree in co-relation 6145. Up to 1628 conditions per place. [2024-06-27 23:23:17,070 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 46 selfloop transitions, 25 changer transitions 0/77 dead transitions. [2024-06-27 23:23:17,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 553 flow [2024-06-27 23:23:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:23:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:23:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-27 23:23:17,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:23:17,072 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 295 flow. Second operand 6 states and 123 transitions. [2024-06-27 23:23:17,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 553 flow [2024-06-27 23:23:17,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 77 transitions, 525 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 23:23:17,079 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 383 flow [2024-06-27 23:23:17,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=383, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-27 23:23:17,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-27 23:23:17,080 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 383 flow [2024-06-27 23:23:17,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:17,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:17,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:17,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:23:17,081 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:17,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:17,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1992266979, now seen corresponding path program 3 times [2024-06-27 23:23:17,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:17,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429556770] [2024-06-27 23:23:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:17,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:18,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:18,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429556770] [2024-06-27 23:23:18,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429556770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:18,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:18,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:23:18,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862870558] [2024-06-27 23:23:18,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:18,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:23:18,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:18,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:23:18,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:23:18,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:23:18,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 383 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:18,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:18,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:23:18,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:18,910 INFO L124 PetriNetUnfolderBase]: 1133/1823 cut-off events. [2024-06-27 23:23:18,911 INFO L125 PetriNetUnfolderBase]: For 6960/6960 co-relation queries the response was YES. [2024-06-27 23:23:18,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6653 conditions, 1823 events. 1133/1823 cut-off events. For 6960/6960 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8928 event pairs, 442 based on Foata normal form. 2/1822 useless extension candidates. Maximal degree in co-relation 6628. Up to 1663 conditions per place. [2024-06-27 23:23:18,929 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 58 selfloop transitions, 24 changer transitions 0/88 dead transitions. [2024-06-27 23:23:18,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 88 transitions, 646 flow [2024-06-27 23:23:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:23:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:23:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 23:23:18,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-27 23:23:18,934 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 383 flow. Second operand 7 states and 139 transitions. [2024-06-27 23:23:18,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 88 transitions, 646 flow [2024-06-27 23:23:18,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 88 transitions, 597 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 23:23:18,942 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 455 flow [2024-06-27 23:23:18,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=455, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-27 23:23:18,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-27 23:23:18,944 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 455 flow [2024-06-27 23:23:18,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:18,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:18,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:18,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:23:18,945 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:18,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:18,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1619259171, now seen corresponding path program 1 times [2024-06-27 23:23:18,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:18,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763590909] [2024-06-27 23:23:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:18,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:20,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:20,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:20,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763590909] [2024-06-27 23:23:20,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763590909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:20,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:20,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:23:20,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289564743] [2024-06-27 23:23:20,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:20,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:23:20,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:20,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:23:20,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:23:21,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:23:21,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 455 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:21,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:21,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:23:21,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:21,663 INFO L124 PetriNetUnfolderBase]: 1390/2177 cut-off events. [2024-06-27 23:23:21,663 INFO L125 PetriNetUnfolderBase]: For 9522/9522 co-relation queries the response was YES. [2024-06-27 23:23:21,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8150 conditions, 2177 events. 1390/2177 cut-off events. For 9522/9522 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10502 event pairs, 547 based on Foata normal form. 2/2176 useless extension candidates. Maximal degree in co-relation 8122. Up to 2046 conditions per place. [2024-06-27 23:23:21,684 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 71 selfloop transitions, 16 changer transitions 0/92 dead transitions. [2024-06-27 23:23:21,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 92 transitions, 722 flow [2024-06-27 23:23:21,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:23:21,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:23:21,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 23:23:21,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-27 23:23:21,686 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 455 flow. Second operand 7 states and 130 transitions. [2024-06-27 23:23:21,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 92 transitions, 722 flow [2024-06-27 23:23:21,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 659 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 23:23:21,695 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 483 flow [2024-06-27 23:23:21,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=483, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2024-06-27 23:23:21,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-27 23:23:21,697 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 483 flow [2024-06-27 23:23:21,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:21,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:21,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:21,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:23:21,698 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:21,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:21,698 INFO L85 PathProgramCache]: Analyzing trace with hash -380665011, now seen corresponding path program 1 times [2024-06-27 23:23:21,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:21,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454774600] [2024-06-27 23:23:21,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:21,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:23,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:23,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454774600] [2024-06-27 23:23:23,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454774600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:23,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:23,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:23:23,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365580619] [2024-06-27 23:23:23,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:23,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:23:23,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:23,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:23:23,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:23:23,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:23:23,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 483 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:23,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:23,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:23:23,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:24,346 INFO L124 PetriNetUnfolderBase]: 1367/2171 cut-off events. [2024-06-27 23:23:24,346 INFO L125 PetriNetUnfolderBase]: For 11755/11775 co-relation queries the response was YES. [2024-06-27 23:23:24,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8798 conditions, 2171 events. 1367/2171 cut-off events. For 11755/11775 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10882 event pairs, 466 based on Foata normal form. 2/2166 useless extension candidates. Maximal degree in co-relation 8769. Up to 1976 conditions per place. [2024-06-27 23:23:24,359 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 68 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-06-27 23:23:24,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 783 flow [2024-06-27 23:23:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:23:24,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:23:24,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 23:23:24,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-27 23:23:24,360 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 483 flow. Second operand 8 states and 153 transitions. [2024-06-27 23:23:24,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 783 flow [2024-06-27 23:23:24,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 101 transitions, 739 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 23:23:24,370 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 566 flow [2024-06-27 23:23:24,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=566, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2024-06-27 23:23:24,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-27 23:23:24,371 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 566 flow [2024-06-27 23:23:24,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:24,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:24,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:24,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:23:24,372 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:24,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:24,373 INFO L85 PathProgramCache]: Analyzing trace with hash -380660361, now seen corresponding path program 2 times [2024-06-27 23:23:24,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:24,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283830603] [2024-06-27 23:23:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:24,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:26,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:26,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283830603] [2024-06-27 23:23:26,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283830603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:26,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:26,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:23:26,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021672872] [2024-06-27 23:23:26,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:26,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:23:26,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:26,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:23:26,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:23:26,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:23:26,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 566 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:26,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:26,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:23:26,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:27,327 INFO L124 PetriNetUnfolderBase]: 1326/2107 cut-off events. [2024-06-27 23:23:27,327 INFO L125 PetriNetUnfolderBase]: For 13893/13913 co-relation queries the response was YES. [2024-06-27 23:23:27,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9054 conditions, 2107 events. 1326/2107 cut-off events. For 13893/13913 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10513 event pairs, 481 based on Foata normal form. 12/2112 useless extension candidates. Maximal degree in co-relation 9023. Up to 1893 conditions per place. [2024-06-27 23:23:27,345 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 64 selfloop transitions, 33 changer transitions 0/104 dead transitions. [2024-06-27 23:23:27,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 104 transitions, 854 flow [2024-06-27 23:23:27,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:23:27,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:23:27,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 23:23:27,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-27 23:23:27,348 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 566 flow. Second operand 7 states and 143 transitions. [2024-06-27 23:23:27,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 104 transitions, 854 flow [2024-06-27 23:23:27,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 104 transitions, 799 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 23:23:27,365 INFO L231 Difference]: Finished difference. Result has 79 places, 85 transitions, 628 flow [2024-06-27 23:23:27,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=628, PETRI_PLACES=79, PETRI_TRANSITIONS=85} [2024-06-27 23:23:27,366 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-27 23:23:27,366 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 85 transitions, 628 flow [2024-06-27 23:23:27,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:27,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:27,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:27,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:23:27,367 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:27,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:27,368 INFO L85 PathProgramCache]: Analyzing trace with hash -387755347, now seen corresponding path program 3 times [2024-06-27 23:23:27,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:27,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823356856] [2024-06-27 23:23:27,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:27,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:29,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:29,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823356856] [2024-06-27 23:23:29,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823356856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:29,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:29,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:23:29,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171776892] [2024-06-27 23:23:29,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:29,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:23:29,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:29,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:23:29,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:23:29,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:23:29,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 85 transitions, 628 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:29,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:29,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:23:29,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:30,028 INFO L124 PetriNetUnfolderBase]: 1337/2137 cut-off events. [2024-06-27 23:23:30,028 INFO L125 PetriNetUnfolderBase]: For 17615/17645 co-relation queries the response was YES. [2024-06-27 23:23:30,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9692 conditions, 2137 events. 1337/2137 cut-off events. For 17615/17645 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10699 event pairs, 484 based on Foata normal form. 7/2133 useless extension candidates. Maximal degree in co-relation 9660. Up to 1852 conditions per place. [2024-06-27 23:23:30,045 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 58 selfloop transitions, 46 changer transitions 0/111 dead transitions. [2024-06-27 23:23:30,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 111 transitions, 1022 flow [2024-06-27 23:23:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:23:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:23:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 23:23:30,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017421602787456 [2024-06-27 23:23:30,048 INFO L175 Difference]: Start difference. First operand has 79 places, 85 transitions, 628 flow. Second operand 7 states and 144 transitions. [2024-06-27 23:23:30,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 111 transitions, 1022 flow [2024-06-27 23:23:30,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 111 transitions, 931 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 23:23:30,094 INFO L231 Difference]: Finished difference. Result has 81 places, 91 transitions, 727 flow [2024-06-27 23:23:30,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=727, PETRI_PLACES=81, PETRI_TRANSITIONS=91} [2024-06-27 23:23:30,095 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-27 23:23:30,095 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 91 transitions, 727 flow [2024-06-27 23:23:30,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:30,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:30,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:30,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:23:30,095 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:30,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:30,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1274849289, now seen corresponding path program 4 times [2024-06-27 23:23:30,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:30,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037748444] [2024-06-27 23:23:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:30,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:31,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:31,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037748444] [2024-06-27 23:23:31,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037748444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:31,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:31,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:23:31,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012474563] [2024-06-27 23:23:31,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:31,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:23:31,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:31,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:23:31,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:23:31,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:23:31,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 91 transitions, 727 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:31,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:31,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:23:31,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:31,998 INFO L124 PetriNetUnfolderBase]: 1374/2206 cut-off events. [2024-06-27 23:23:31,998 INFO L125 PetriNetUnfolderBase]: For 21188/21220 co-relation queries the response was YES. [2024-06-27 23:23:32,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10495 conditions, 2206 events. 1374/2206 cut-off events. For 21188/21220 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11149 event pairs, 473 based on Foata normal form. 9/2212 useless extension candidates. Maximal degree in co-relation 10462. Up to 1977 conditions per place. [2024-06-27 23:23:32,015 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 86 selfloop transitions, 37 changer transitions 0/130 dead transitions. [2024-06-27 23:23:32,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 130 transitions, 1169 flow [2024-06-27 23:23:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:23:32,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:23:32,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:23:32,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 23:23:32,017 INFO L175 Difference]: Start difference. First operand has 81 places, 91 transitions, 727 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:23:32,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 130 transitions, 1169 flow [2024-06-27 23:23:32,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 130 transitions, 1098 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 23:23:32,042 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 887 flow [2024-06-27 23:23:32,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=887, PETRI_PLACES=87, PETRI_TRANSITIONS=104} [2024-06-27 23:23:32,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-27 23:23:32,043 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 887 flow [2024-06-27 23:23:32,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:32,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:32,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:32,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:23:32,044 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:32,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:32,045 INFO L85 PathProgramCache]: Analyzing trace with hash 101134421, now seen corresponding path program 5 times [2024-06-27 23:23:32,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:32,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505446086] [2024-06-27 23:23:32,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:32,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:33,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:33,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505446086] [2024-06-27 23:23:33,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505446086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:33,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:33,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:23:33,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060384667] [2024-06-27 23:23:33,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:33,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:23:33,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:33,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:23:33,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:23:33,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:23:33,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 887 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:33,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:33,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:23:33,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:34,096 INFO L124 PetriNetUnfolderBase]: 1413/2277 cut-off events. [2024-06-27 23:23:34,096 INFO L125 PetriNetUnfolderBase]: For 23998/24030 co-relation queries the response was YES. [2024-06-27 23:23:34,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11229 conditions, 2277 events. 1413/2277 cut-off events. For 23998/24030 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11618 event pairs, 473 based on Foata normal form. 9/2283 useless extension candidates. Maximal degree in co-relation 11193. Up to 2024 conditions per place. [2024-06-27 23:23:34,114 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 91 selfloop transitions, 46 changer transitions 0/144 dead transitions. [2024-06-27 23:23:34,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 144 transitions, 1439 flow [2024-06-27 23:23:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:23:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:23:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:23:34,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 23:23:34,116 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 887 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:23:34,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 144 transitions, 1439 flow [2024-06-27 23:23:34,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 144 transitions, 1293 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 23:23:34,142 INFO L231 Difference]: Finished difference. Result has 90 places, 120 transitions, 1081 flow [2024-06-27 23:23:34,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1081, PETRI_PLACES=90, PETRI_TRANSITIONS=120} [2024-06-27 23:23:34,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-27 23:23:34,143 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 120 transitions, 1081 flow [2024-06-27 23:23:34,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:34,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:34,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:34,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:23:34,144 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:34,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:34,144 INFO L85 PathProgramCache]: Analyzing trace with hash 101254391, now seen corresponding path program 6 times [2024-06-27 23:23:34,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:34,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786381289] [2024-06-27 23:23:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:34,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:35,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:35,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786381289] [2024-06-27 23:23:35,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786381289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:35,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:35,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:23:35,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592600332] [2024-06-27 23:23:35,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:35,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:23:35,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:35,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:23:35,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:23:35,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:23:35,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 120 transitions, 1081 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:35,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:35,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:23:35,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:36,446 INFO L124 PetriNetUnfolderBase]: 1415/2280 cut-off events. [2024-06-27 23:23:36,446 INFO L125 PetriNetUnfolderBase]: For 26151/26181 co-relation queries the response was YES. [2024-06-27 23:23:36,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11381 conditions, 2280 events. 1415/2280 cut-off events. For 26151/26181 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11632 event pairs, 479 based on Foata normal form. 7/2284 useless extension candidates. Maximal degree in co-relation 11344. Up to 1985 conditions per place. [2024-06-27 23:23:36,464 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 78 selfloop transitions, 62 changer transitions 0/147 dead transitions. [2024-06-27 23:23:36,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 147 transitions, 1459 flow [2024-06-27 23:23:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:23:36,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:23:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:23:36,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 23:23:36,466 INFO L175 Difference]: Start difference. First operand has 90 places, 120 transitions, 1081 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:23:36,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 147 transitions, 1459 flow [2024-06-27 23:23:36,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 147 transitions, 1376 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 23:23:36,496 INFO L231 Difference]: Finished difference. Result has 95 places, 123 transitions, 1158 flow [2024-06-27 23:23:36,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1158, PETRI_PLACES=95, PETRI_TRANSITIONS=123} [2024-06-27 23:23:36,496 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-27 23:23:36,496 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 123 transitions, 1158 flow [2024-06-27 23:23:36,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:36,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:36,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:36,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:23:36,497 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:36,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:36,498 INFO L85 PathProgramCache]: Analyzing trace with hash -373985007, now seen corresponding path program 1 times [2024-06-27 23:23:36,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:36,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378432805] [2024-06-27 23:23:36,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:36,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:38,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:38,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378432805] [2024-06-27 23:23:38,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378432805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:38,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:38,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:23:38,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830514633] [2024-06-27 23:23:38,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:38,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:23:38,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:38,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:23:38,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:23:38,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:23:38,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 123 transitions, 1158 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:38,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:38,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:23:38,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:38,988 INFO L124 PetriNetUnfolderBase]: 1376/2273 cut-off events. [2024-06-27 23:23:38,988 INFO L125 PetriNetUnfolderBase]: For 24964/24964 co-relation queries the response was YES. [2024-06-27 23:23:38,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10964 conditions, 2273 events. 1376/2273 cut-off events. For 24964/24964 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 11707 event pairs, 481 based on Foata normal form. 4/2260 useless extension candidates. Maximal degree in co-relation 10926. Up to 2011 conditions per place. [2024-06-27 23:23:39,002 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 124 selfloop transitions, 18 changer transitions 0/148 dead transitions. [2024-06-27 23:23:39,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 148 transitions, 1552 flow [2024-06-27 23:23:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:23:39,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:23:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 23:23:39,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-27 23:23:39,004 INFO L175 Difference]: Start difference. First operand has 95 places, 123 transitions, 1158 flow. Second operand 9 states and 165 transitions. [2024-06-27 23:23:39,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 148 transitions, 1552 flow [2024-06-27 23:23:39,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 148 transitions, 1358 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 23:23:39,033 INFO L231 Difference]: Finished difference. Result has 97 places, 125 transitions, 1043 flow [2024-06-27 23:23:39,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1043, PETRI_PLACES=97, PETRI_TRANSITIONS=125} [2024-06-27 23:23:39,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-27 23:23:39,034 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 125 transitions, 1043 flow [2024-06-27 23:23:39,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:39,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:39,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:39,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:23:39,035 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:39,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:39,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1304265577, now seen corresponding path program 1 times [2024-06-27 23:23:39,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:39,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646145656] [2024-06-27 23:23:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:39,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:40,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:40,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646145656] [2024-06-27 23:23:40,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646145656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:40,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:40,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:23:40,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548013827] [2024-06-27 23:23:40,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:40,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:23:40,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:40,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:23:40,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:23:40,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:23:40,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 125 transitions, 1043 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:40,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:40,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:23:40,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:40,612 INFO L124 PetriNetUnfolderBase]: 1580/2490 cut-off events. [2024-06-27 23:23:40,612 INFO L125 PetriNetUnfolderBase]: For 30362/30362 co-relation queries the response was YES. [2024-06-27 23:23:40,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12307 conditions, 2490 events. 1580/2490 cut-off events. For 30362/30362 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 12308 event pairs, 585 based on Foata normal form. 1/2488 useless extension candidates. Maximal degree in co-relation 12268. Up to 2346 conditions per place. [2024-06-27 23:23:40,660 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 120 selfloop transitions, 10 changer transitions 0/135 dead transitions. [2024-06-27 23:23:40,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 135 transitions, 1347 flow [2024-06-27 23:23:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:23:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:23:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-27 23:23:40,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-27 23:23:40,662 INFO L175 Difference]: Start difference. First operand has 97 places, 125 transitions, 1043 flow. Second operand 5 states and 92 transitions. [2024-06-27 23:23:40,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 135 transitions, 1347 flow [2024-06-27 23:23:40,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 135 transitions, 1286 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 23:23:40,694 INFO L231 Difference]: Finished difference. Result has 95 places, 128 transitions, 1038 flow [2024-06-27 23:23:40,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1038, PETRI_PLACES=95, PETRI_TRANSITIONS=128} [2024-06-27 23:23:40,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-27 23:23:40,694 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 128 transitions, 1038 flow [2024-06-27 23:23:40,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:40,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:40,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:40,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:23:40,695 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:40,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:40,696 INFO L85 PathProgramCache]: Analyzing trace with hash 87629908, now seen corresponding path program 1 times [2024-06-27 23:23:40,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:40,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228774387] [2024-06-27 23:23:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:40,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:42,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:42,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228774387] [2024-06-27 23:23:42,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228774387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:42,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:42,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:23:42,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614208263] [2024-06-27 23:23:42,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:42,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:23:42,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:42,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:23:42,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:23:42,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:23:42,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 128 transitions, 1038 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:42,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:42,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:23:42,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:42,928 INFO L124 PetriNetUnfolderBase]: 1671/2604 cut-off events. [2024-06-27 23:23:42,928 INFO L125 PetriNetUnfolderBase]: For 38878/38881 co-relation queries the response was YES. [2024-06-27 23:23:42,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13594 conditions, 2604 events. 1671/2604 cut-off events. For 38878/38881 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 12855 event pairs, 536 based on Foata normal form. 4/2603 useless extension candidates. Maximal degree in co-relation 13553. Up to 2384 conditions per place. [2024-06-27 23:23:42,941 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 121 selfloop transitions, 31 changer transitions 0/158 dead transitions. [2024-06-27 23:23:42,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 158 transitions, 1494 flow [2024-06-27 23:23:42,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:23:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:23:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 23:23:42,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-27 23:23:42,942 INFO L175 Difference]: Start difference. First operand has 95 places, 128 transitions, 1038 flow. Second operand 8 states and 150 transitions. [2024-06-27 23:23:42,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 158 transitions, 1494 flow [2024-06-27 23:23:42,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 158 transitions, 1468 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 23:23:42,966 INFO L231 Difference]: Finished difference. Result has 101 places, 136 transitions, 1176 flow [2024-06-27 23:23:42,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1176, PETRI_PLACES=101, PETRI_TRANSITIONS=136} [2024-06-27 23:23:42,966 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-27 23:23:42,967 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 136 transitions, 1176 flow [2024-06-27 23:23:42,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:42,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:42,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:42,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:23:42,967 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:42,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:42,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1283739732, now seen corresponding path program 2 times [2024-06-27 23:23:42,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:42,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371460155] [2024-06-27 23:23:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:42,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:44,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:44,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371460155] [2024-06-27 23:23:44,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371460155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:44,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:44,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:23:44,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816663304] [2024-06-27 23:23:44,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:44,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:23:44,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:44,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:23:44,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:23:44,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:23:44,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 136 transitions, 1176 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:44,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:44,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:23:44,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:45,412 INFO L124 PetriNetUnfolderBase]: 1693/2628 cut-off events. [2024-06-27 23:23:45,412 INFO L125 PetriNetUnfolderBase]: For 43664/43664 co-relation queries the response was YES. [2024-06-27 23:23:45,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14479 conditions, 2628 events. 1693/2628 cut-off events. For 43664/43664 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 12858 event pairs, 465 based on Foata normal form. 2/2617 useless extension candidates. Maximal degree in co-relation 14435. Up to 2232 conditions per place. [2024-06-27 23:23:45,426 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 82 selfloop transitions, 78 changer transitions 0/166 dead transitions. [2024-06-27 23:23:45,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 166 transitions, 1647 flow [2024-06-27 23:23:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:23:45,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:23:45,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 23:23:45,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-27 23:23:45,428 INFO L175 Difference]: Start difference. First operand has 101 places, 136 transitions, 1176 flow. Second operand 8 states and 155 transitions. [2024-06-27 23:23:45,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 166 transitions, 1647 flow [2024-06-27 23:23:45,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 166 transitions, 1558 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 23:23:45,461 INFO L231 Difference]: Finished difference. Result has 105 places, 143 transitions, 1334 flow [2024-06-27 23:23:45,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1334, PETRI_PLACES=105, PETRI_TRANSITIONS=143} [2024-06-27 23:23:45,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-27 23:23:45,462 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 143 transitions, 1334 flow [2024-06-27 23:23:45,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:45,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:45,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:45,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:23:45,463 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:45,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:45,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1291091382, now seen corresponding path program 3 times [2024-06-27 23:23:45,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:45,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609399958] [2024-06-27 23:23:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:45,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:46,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:46,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609399958] [2024-06-27 23:23:46,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609399958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:46,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:46,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:23:46,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819166943] [2024-06-27 23:23:46,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:46,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:23:46,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:46,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:23:46,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:23:47,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:23:47,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 143 transitions, 1334 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:47,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:47,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:23:47,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:47,630 INFO L124 PetriNetUnfolderBase]: 1704/2658 cut-off events. [2024-06-27 23:23:47,630 INFO L125 PetriNetUnfolderBase]: For 49535/49541 co-relation queries the response was YES. [2024-06-27 23:23:47,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15422 conditions, 2658 events. 1704/2658 cut-off events. For 49535/49541 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 13182 event pairs, 530 based on Foata normal form. 6/2656 useless extension candidates. Maximal degree in co-relation 15376. Up to 2372 conditions per place. [2024-06-27 23:23:47,645 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 117 selfloop transitions, 50 changer transitions 0/173 dead transitions. [2024-06-27 23:23:47,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 173 transitions, 1842 flow [2024-06-27 23:23:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:23:47,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:23:47,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:23:47,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-27 23:23:47,646 INFO L175 Difference]: Start difference. First operand has 105 places, 143 transitions, 1334 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:23:47,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 173 transitions, 1842 flow [2024-06-27 23:23:47,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 173 transitions, 1642 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 23:23:47,680 INFO L231 Difference]: Finished difference. Result has 109 places, 151 transitions, 1365 flow [2024-06-27 23:23:47,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1365, PETRI_PLACES=109, PETRI_TRANSITIONS=151} [2024-06-27 23:23:47,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-27 23:23:47,681 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 151 transitions, 1365 flow [2024-06-27 23:23:47,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:47,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:47,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:47,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:23:47,682 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:47,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:47,683 INFO L85 PathProgramCache]: Analyzing trace with hash 864702626, now seen corresponding path program 4 times [2024-06-27 23:23:47,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:47,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777047046] [2024-06-27 23:23:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:47,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:49,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:49,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777047046] [2024-06-27 23:23:49,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777047046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:49,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:49,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:23:49,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898905483] [2024-06-27 23:23:49,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:49,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:23:49,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:49,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:23:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:23:49,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:23:49,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 151 transitions, 1365 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:49,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:49,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:23:49,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:49,927 INFO L124 PetriNetUnfolderBase]: 1733/2691 cut-off events. [2024-06-27 23:23:49,927 INFO L125 PetriNetUnfolderBase]: For 55121/55121 co-relation queries the response was YES. [2024-06-27 23:23:49,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16222 conditions, 2691 events. 1733/2691 cut-off events. For 55121/55121 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 13199 event pairs, 402 based on Foata normal form. 2/2679 useless extension candidates. Maximal degree in co-relation 16174. Up to 2209 conditions per place. [2024-06-27 23:23:49,943 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 77 selfloop transitions, 112 changer transitions 0/195 dead transitions. [2024-06-27 23:23:49,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 195 transitions, 2137 flow [2024-06-27 23:23:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:23:49,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:23:49,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 23:23:49,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-27 23:23:49,945 INFO L175 Difference]: Start difference. First operand has 109 places, 151 transitions, 1365 flow. Second operand 8 states and 159 transitions. [2024-06-27 23:23:49,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 195 transitions, 2137 flow [2024-06-27 23:23:49,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 195 transitions, 2029 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 23:23:49,989 INFO L231 Difference]: Finished difference. Result has 116 places, 171 transitions, 1799 flow [2024-06-27 23:23:49,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1799, PETRI_PLACES=116, PETRI_TRANSITIONS=171} [2024-06-27 23:23:49,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-27 23:23:49,990 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 171 transitions, 1799 flow [2024-06-27 23:23:49,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:49,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:49,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:49,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:23:49,991 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:49,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:49,991 INFO L85 PathProgramCache]: Analyzing trace with hash 654426004, now seen corresponding path program 5 times [2024-06-27 23:23:49,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:49,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706519130] [2024-06-27 23:23:49,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:49,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:51,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:51,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706519130] [2024-06-27 23:23:51,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706519130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:51,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:51,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:23:51,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068598503] [2024-06-27 23:23:51,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:51,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:23:51,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:51,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:23:51,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:23:51,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:23:51,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 171 transitions, 1799 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:51,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:51,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:23:51,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:52,366 INFO L124 PetriNetUnfolderBase]: 1733/2680 cut-off events. [2024-06-27 23:23:52,366 INFO L125 PetriNetUnfolderBase]: For 60622/60624 co-relation queries the response was YES. [2024-06-27 23:23:52,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17001 conditions, 2680 events. 1733/2680 cut-off events. For 60622/60624 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 13112 event pairs, 489 based on Foata normal form. 4/2681 useless extension candidates. Maximal degree in co-relation 16950. Up to 2472 conditions per place. [2024-06-27 23:23:52,384 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 163 selfloop transitions, 36 changer transitions 0/205 dead transitions. [2024-06-27 23:23:52,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 205 transitions, 2371 flow [2024-06-27 23:23:52,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:23:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:23:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 23:23:52,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-27 23:23:52,388 INFO L175 Difference]: Start difference. First operand has 116 places, 171 transitions, 1799 flow. Second operand 9 states and 167 transitions. [2024-06-27 23:23:52,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 205 transitions, 2371 flow [2024-06-27 23:23:52,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 205 transitions, 2271 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-27 23:23:52,437 INFO L231 Difference]: Finished difference. Result has 124 places, 177 transitions, 1883 flow [2024-06-27 23:23:52,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1883, PETRI_PLACES=124, PETRI_TRANSITIONS=177} [2024-06-27 23:23:52,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-27 23:23:52,438 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 177 transitions, 1883 flow [2024-06-27 23:23:52,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:52,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:52,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:52,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:23:52,438 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:52,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:52,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1777525919, now seen corresponding path program 1 times [2024-06-27 23:23:52,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:52,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540331066] [2024-06-27 23:23:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:52,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:53,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:53,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540331066] [2024-06-27 23:23:53,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540331066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:53,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:53,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:23:53,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667934054] [2024-06-27 23:23:53,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:53,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:23:53,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:53,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:23:53,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:23:53,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:23:53,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 177 transitions, 1883 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:53,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:53,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:23:53,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:54,376 INFO L124 PetriNetUnfolderBase]: 1647/2580 cut-off events. [2024-06-27 23:23:54,376 INFO L125 PetriNetUnfolderBase]: For 54963/54963 co-relation queries the response was YES. [2024-06-27 23:23:54,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16025 conditions, 2580 events. 1647/2580 cut-off events. For 54963/54963 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 12697 event pairs, 503 based on Foata normal form. 2/2579 useless extension candidates. Maximal degree in co-relation 15971. Up to 2438 conditions per place. [2024-06-27 23:23:54,392 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 171 selfloop transitions, 13 changer transitions 0/189 dead transitions. [2024-06-27 23:23:54,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 189 transitions, 2303 flow [2024-06-27 23:23:54,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:23:54,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:23:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 23:23:54,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-27 23:23:54,393 INFO L175 Difference]: Start difference. First operand has 124 places, 177 transitions, 1883 flow. Second operand 6 states and 107 transitions. [2024-06-27 23:23:54,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 189 transitions, 2303 flow [2024-06-27 23:23:54,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 189 transitions, 2177 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 23:23:54,444 INFO L231 Difference]: Finished difference. Result has 122 places, 180 transitions, 1823 flow [2024-06-27 23:23:54,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1757, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1823, PETRI_PLACES=122, PETRI_TRANSITIONS=180} [2024-06-27 23:23:54,445 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-27 23:23:54,445 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 180 transitions, 1823 flow [2024-06-27 23:23:54,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:54,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:54,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:54,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:23:54,445 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:54,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:54,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1693914506, now seen corresponding path program 1 times [2024-06-27 23:23:54,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:54,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208892139] [2024-06-27 23:23:54,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:54,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:55,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:55,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208892139] [2024-06-27 23:23:55,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208892139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:55,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:55,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:23:55,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106941144] [2024-06-27 23:23:55,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:55,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:23:55,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:55,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:23:55,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:23:55,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:23:55,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 180 transitions, 1823 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:55,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:55,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:23:55,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:56,587 INFO L124 PetriNetUnfolderBase]: 1618/2574 cut-off events. [2024-06-27 23:23:56,587 INFO L125 PetriNetUnfolderBase]: For 67322/67322 co-relation queries the response was YES. [2024-06-27 23:23:56,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17023 conditions, 2574 events. 1618/2574 cut-off events. For 67322/67322 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 13229 event pairs, 409 based on Foata normal form. 4/2564 useless extension candidates. Maximal degree in co-relation 16968. Up to 2229 conditions per place. [2024-06-27 23:23:56,646 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 140 selfloop transitions, 52 changer transitions 0/205 dead transitions. [2024-06-27 23:23:56,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 205 transitions, 2329 flow [2024-06-27 23:23:56,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:23:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:23:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:23:56,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 23:23:56,648 INFO L175 Difference]: Start difference. First operand has 122 places, 180 transitions, 1823 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:23:56,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 205 transitions, 2329 flow [2024-06-27 23:23:56,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 205 transitions, 2291 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 23:23:56,705 INFO L231 Difference]: Finished difference. Result has 126 places, 182 transitions, 1953 flow [2024-06-27 23:23:56,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1785, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1953, PETRI_PLACES=126, PETRI_TRANSITIONS=182} [2024-06-27 23:23:56,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-27 23:23:56,706 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 182 transitions, 1953 flow [2024-06-27 23:23:56,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:56,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:56,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:56,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:23:56,706 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:56,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:56,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1696771466, now seen corresponding path program 2 times [2024-06-27 23:23:56,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:56,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526426363] [2024-06-27 23:23:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:56,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:23:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:23:57,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:23:57,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526426363] [2024-06-27 23:23:57,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526426363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:23:57,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:23:57,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:23:57,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904782666] [2024-06-27 23:23:57,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:23:57,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:23:57,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:23:57,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:23:57,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:23:58,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:23:58,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 182 transitions, 1953 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:58,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:23:58,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:23:58,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:23:58,831 INFO L124 PetriNetUnfolderBase]: 1661/2648 cut-off events. [2024-06-27 23:23:58,831 INFO L125 PetriNetUnfolderBase]: For 75427/75427 co-relation queries the response was YES. [2024-06-27 23:23:58,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17985 conditions, 2648 events. 1661/2648 cut-off events. For 75427/75427 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 13836 event pairs, 411 based on Foata normal form. 4/2629 useless extension candidates. Maximal degree in co-relation 17929. Up to 2309 conditions per place. [2024-06-27 23:23:58,851 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 159 selfloop transitions, 39 changer transitions 0/211 dead transitions. [2024-06-27 23:23:58,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 211 transitions, 2489 flow [2024-06-27 23:23:58,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:23:58,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:23:58,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 23:23:58,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-27 23:23:58,853 INFO L175 Difference]: Start difference. First operand has 126 places, 182 transitions, 1953 flow. Second operand 9 states and 172 transitions. [2024-06-27 23:23:58,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 211 transitions, 2489 flow [2024-06-27 23:23:58,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 211 transitions, 2349 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 23:23:58,915 INFO L231 Difference]: Finished difference. Result has 130 places, 186 transitions, 1971 flow [2024-06-27 23:23:58,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1971, PETRI_PLACES=130, PETRI_TRANSITIONS=186} [2024-06-27 23:23:58,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-27 23:23:58,915 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 186 transitions, 1971 flow [2024-06-27 23:23:58,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:23:58,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:23:58,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:23:58,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:23:58,916 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:23:58,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:23:58,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1578623336, now seen corresponding path program 3 times [2024-06-27 23:23:58,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:23:58,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067428081] [2024-06-27 23:23:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:23:58,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:23:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:00,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:00,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067428081] [2024-06-27 23:24:00,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067428081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:00,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:00,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:24:00,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243960008] [2024-06-27 23:24:00,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:00,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:24:00,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:00,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:24:00,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:24:00,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:24:00,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 186 transitions, 1971 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:00,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:00,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:24:00,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:01,529 INFO L124 PetriNetUnfolderBase]: 1706/2703 cut-off events. [2024-06-27 23:24:01,529 INFO L125 PetriNetUnfolderBase]: For 84709/84709 co-relation queries the response was YES. [2024-06-27 23:24:01,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18755 conditions, 2703 events. 1706/2703 cut-off events. For 84709/84709 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13962 event pairs, 441 based on Foata normal form. 8/2689 useless extension candidates. Maximal degree in co-relation 18697. Up to 2327 conditions per place. [2024-06-27 23:24:01,549 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 132 selfloop transitions, 66 changer transitions 0/211 dead transitions. [2024-06-27 23:24:01,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 211 transitions, 2499 flow [2024-06-27 23:24:01,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:24:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:24:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 23:24:01,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-27 23:24:01,551 INFO L175 Difference]: Start difference. First operand has 130 places, 186 transitions, 1971 flow. Second operand 8 states and 161 transitions. [2024-06-27 23:24:01,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 211 transitions, 2499 flow [2024-06-27 23:24:01,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 211 transitions, 2381 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 23:24:01,613 INFO L231 Difference]: Finished difference. Result has 132 places, 188 transitions, 2053 flow [2024-06-27 23:24:01,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2053, PETRI_PLACES=132, PETRI_TRANSITIONS=188} [2024-06-27 23:24:01,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-27 23:24:01,614 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 188 transitions, 2053 flow [2024-06-27 23:24:01,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:01,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:01,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:01,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:24:01,615 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:01,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:01,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1693909546, now seen corresponding path program 1 times [2024-06-27 23:24:01,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:01,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267647318] [2024-06-27 23:24:01,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:01,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:03,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:03,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267647318] [2024-06-27 23:24:03,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267647318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:03,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:03,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:24:03,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149771860] [2024-06-27 23:24:03,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:03,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:24:03,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:03,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:24:03,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:24:03,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:24:03,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 188 transitions, 2053 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:03,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:03,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:24:03,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:04,403 INFO L124 PetriNetUnfolderBase]: 1863/2887 cut-off events. [2024-06-27 23:24:04,404 INFO L125 PetriNetUnfolderBase]: For 87699/87699 co-relation queries the response was YES. [2024-06-27 23:24:04,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19602 conditions, 2887 events. 1863/2887 cut-off events. For 87699/87699 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14357 event pairs, 417 based on Foata normal form. 2/2880 useless extension candidates. Maximal degree in co-relation 19543. Up to 2625 conditions per place. [2024-06-27 23:24:04,425 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 158 selfloop transitions, 54 changer transitions 0/218 dead transitions. [2024-06-27 23:24:04,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 218 transitions, 2631 flow [2024-06-27 23:24:04,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:24:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:24:04,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 23:24:04,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 23:24:04,426 INFO L175 Difference]: Start difference. First operand has 132 places, 188 transitions, 2053 flow. Second operand 10 states and 180 transitions. [2024-06-27 23:24:04,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 218 transitions, 2631 flow [2024-06-27 23:24:04,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 218 transitions, 2451 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 23:24:04,503 INFO L231 Difference]: Finished difference. Result has 137 places, 192 transitions, 2077 flow [2024-06-27 23:24:04,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2077, PETRI_PLACES=137, PETRI_TRANSITIONS=192} [2024-06-27 23:24:04,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-27 23:24:04,503 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 192 transitions, 2077 flow [2024-06-27 23:24:04,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:04,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:04,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:04,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:24:04,504 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:04,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:04,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1578445396, now seen corresponding path program 2 times [2024-06-27 23:24:04,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:04,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236286075] [2024-06-27 23:24:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:04,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:06,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:06,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:06,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236286075] [2024-06-27 23:24:06,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236286075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:06,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:06,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:24:06,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747989594] [2024-06-27 23:24:06,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:06,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:24:06,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:06,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:24:06,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:24:06,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:24:06,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 192 transitions, 2077 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:06,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:06,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:24:06,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:07,533 INFO L124 PetriNetUnfolderBase]: 1892/2936 cut-off events. [2024-06-27 23:24:07,533 INFO L125 PetriNetUnfolderBase]: For 91808/91808 co-relation queries the response was YES. [2024-06-27 23:24:07,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19881 conditions, 2936 events. 1892/2936 cut-off events. For 91808/91808 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 14685 event pairs, 419 based on Foata normal form. 2/2929 useless extension candidates. Maximal degree in co-relation 19820. Up to 2600 conditions per place. [2024-06-27 23:24:07,551 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 147 selfloop transitions, 79 changer transitions 0/232 dead transitions. [2024-06-27 23:24:07,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 232 transitions, 2765 flow [2024-06-27 23:24:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:24:07,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:24:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 23:24:07,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-27 23:24:07,555 INFO L175 Difference]: Start difference. First operand has 137 places, 192 transitions, 2077 flow. Second operand 10 states and 182 transitions. [2024-06-27 23:24:07,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 232 transitions, 2765 flow [2024-06-27 23:24:07,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 232 transitions, 2617 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 23:24:07,627 INFO L231 Difference]: Finished difference. Result has 141 places, 206 transitions, 2273 flow [2024-06-27 23:24:07,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1929, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2273, PETRI_PLACES=141, PETRI_TRANSITIONS=206} [2024-06-27 23:24:07,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-27 23:24:07,628 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 206 transitions, 2273 flow [2024-06-27 23:24:07,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:07,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:07,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:07,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:24:07,628 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:07,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:07,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1578438886, now seen corresponding path program 3 times [2024-06-27 23:24:07,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:07,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433897220] [2024-06-27 23:24:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:07,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:09,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:09,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433897220] [2024-06-27 23:24:09,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433897220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:09,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:09,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:24:09,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798264011] [2024-06-27 23:24:09,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:09,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:24:09,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:09,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:24:09,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:24:09,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:24:09,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 206 transitions, 2273 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:09,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:09,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:24:09,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:10,606 INFO L124 PetriNetUnfolderBase]: 1919/2975 cut-off events. [2024-06-27 23:24:10,606 INFO L125 PetriNetUnfolderBase]: For 101367/101367 co-relation queries the response was YES. [2024-06-27 23:24:10,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20955 conditions, 2975 events. 1919/2975 cut-off events. For 101367/101367 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14895 event pairs, 424 based on Foata normal form. 2/2968 useless extension candidates. Maximal degree in co-relation 20892. Up to 2584 conditions per place. [2024-06-27 23:24:10,627 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 142 selfloop transitions, 92 changer transitions 0/240 dead transitions. [2024-06-27 23:24:10,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 240 transitions, 3081 flow [2024-06-27 23:24:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:24:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:24:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 23:24:10,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 23:24:10,629 INFO L175 Difference]: Start difference. First operand has 141 places, 206 transitions, 2273 flow. Second operand 10 states and 185 transitions. [2024-06-27 23:24:10,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 240 transitions, 3081 flow [2024-06-27 23:24:10,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 240 transitions, 2922 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 23:24:10,732 INFO L231 Difference]: Finished difference. Result has 146 places, 212 transitions, 2453 flow [2024-06-27 23:24:10,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2453, PETRI_PLACES=146, PETRI_TRANSITIONS=212} [2024-06-27 23:24:10,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-27 23:24:10,733 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 212 transitions, 2453 flow [2024-06-27 23:24:10,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:10,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:10,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:10,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:24:10,734 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:10,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:10,734 INFO L85 PathProgramCache]: Analyzing trace with hash 863673518, now seen corresponding path program 4 times [2024-06-27 23:24:10,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:10,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286573506] [2024-06-27 23:24:10,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:10,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:12,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:12,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286573506] [2024-06-27 23:24:12,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286573506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:12,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:12,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:24:12,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190735824] [2024-06-27 23:24:12,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:12,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:24:12,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:12,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:24:12,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:24:12,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:24:12,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 212 transitions, 2453 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:12,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:12,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:24:12,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:13,634 INFO L124 PetriNetUnfolderBase]: 1914/2968 cut-off events. [2024-06-27 23:24:13,634 INFO L125 PetriNetUnfolderBase]: For 107874/107874 co-relation queries the response was YES. [2024-06-27 23:24:13,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21337 conditions, 2968 events. 1914/2968 cut-off events. For 107874/107874 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14900 event pairs, 424 based on Foata normal form. 2/2961 useless extension candidates. Maximal degree in co-relation 21273. Up to 2632 conditions per place. [2024-06-27 23:24:13,653 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 154 selfloop transitions, 78 changer transitions 0/238 dead transitions. [2024-06-27 23:24:13,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 238 transitions, 3005 flow [2024-06-27 23:24:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:24:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:24:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 23:24:13,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-27 23:24:13,655 INFO L175 Difference]: Start difference. First operand has 146 places, 212 transitions, 2453 flow. Second operand 9 states and 173 transitions. [2024-06-27 23:24:13,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 238 transitions, 3005 flow [2024-06-27 23:24:13,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 238 transitions, 2805 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-27 23:24:13,758 INFO L231 Difference]: Finished difference. Result has 149 places, 212 transitions, 2418 flow [2024-06-27 23:24:13,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2418, PETRI_PLACES=149, PETRI_TRANSITIONS=212} [2024-06-27 23:24:13,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-27 23:24:13,759 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 212 transitions, 2418 flow [2024-06-27 23:24:13,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:13,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:13,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:13,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:24:13,759 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:13,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:13,760 INFO L85 PathProgramCache]: Analyzing trace with hash 863853256, now seen corresponding path program 1 times [2024-06-27 23:24:13,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:13,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851001380] [2024-06-27 23:24:13,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:13,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:15,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:15,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851001380] [2024-06-27 23:24:15,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851001380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:15,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:15,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:24:15,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138940847] [2024-06-27 23:24:15,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:15,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:24:15,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:15,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:24:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:24:15,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:24:15,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 212 transitions, 2418 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:15,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:15,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:24:15,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:16,660 INFO L124 PetriNetUnfolderBase]: 2012/3112 cut-off events. [2024-06-27 23:24:16,660 INFO L125 PetriNetUnfolderBase]: For 128446/128446 co-relation queries the response was YES. [2024-06-27 23:24:16,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22709 conditions, 3112 events. 2012/3112 cut-off events. For 128446/128446 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15721 event pairs, 417 based on Foata normal form. 20/3110 useless extension candidates. Maximal degree in co-relation 22643. Up to 2700 conditions per place. [2024-06-27 23:24:16,680 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 166 selfloop transitions, 72 changer transitions 0/244 dead transitions. [2024-06-27 23:24:16,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 244 transitions, 3078 flow [2024-06-27 23:24:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:24:16,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:24:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 23:24:16,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47696476964769646 [2024-06-27 23:24:16,682 INFO L175 Difference]: Start difference. First operand has 149 places, 212 transitions, 2418 flow. Second operand 9 states and 176 transitions. [2024-06-27 23:24:16,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 244 transitions, 3078 flow [2024-06-27 23:24:16,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 244 transitions, 2862 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 23:24:16,786 INFO L231 Difference]: Finished difference. Result has 150 places, 214 transitions, 2420 flow [2024-06-27 23:24:16,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2202, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2420, PETRI_PLACES=150, PETRI_TRANSITIONS=214} [2024-06-27 23:24:16,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-27 23:24:16,787 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 214 transitions, 2420 flow [2024-06-27 23:24:16,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:16,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:16,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:16,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:24:16,788 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:16,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:16,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2033235004, now seen corresponding path program 1 times [2024-06-27 23:24:16,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:16,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437680154] [2024-06-27 23:24:16,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:16,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:17,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:17,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437680154] [2024-06-27 23:24:17,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437680154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:17,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:17,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:24:17,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198838844] [2024-06-27 23:24:17,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:17,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:24:17,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:17,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:24:17,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:24:18,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:24:18,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 214 transitions, 2420 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:18,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:18,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:24:18,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:18,818 INFO L124 PetriNetUnfolderBase]: 2134/3250 cut-off events. [2024-06-27 23:24:18,819 INFO L125 PetriNetUnfolderBase]: For 126682/126682 co-relation queries the response was YES. [2024-06-27 23:24:18,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23842 conditions, 3250 events. 2134/3250 cut-off events. For 126682/126682 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16072 event pairs, 508 based on Foata normal form. 2/3243 useless extension candidates. Maximal degree in co-relation 23775. Up to 3080 conditions per place. [2024-06-27 23:24:18,843 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 195 selfloop transitions, 40 changer transitions 0/239 dead transitions. [2024-06-27 23:24:18,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 239 transitions, 3208 flow [2024-06-27 23:24:18,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:24:18,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:24:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 23:24:18,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46747967479674796 [2024-06-27 23:24:18,844 INFO L175 Difference]: Start difference. First operand has 150 places, 214 transitions, 2420 flow. Second operand 6 states and 115 transitions. [2024-06-27 23:24:18,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 239 transitions, 3208 flow [2024-06-27 23:24:18,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 239 transitions, 3044 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 23:24:18,967 INFO L231 Difference]: Finished difference. Result has 149 places, 223 transitions, 2456 flow [2024-06-27 23:24:18,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2456, PETRI_PLACES=149, PETRI_TRANSITIONS=223} [2024-06-27 23:24:18,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-27 23:24:18,967 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 223 transitions, 2456 flow [2024-06-27 23:24:18,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:18,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:18,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:18,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:24:18,968 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:18,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:18,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1141042840, now seen corresponding path program 4 times [2024-06-27 23:24:18,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:18,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998780475] [2024-06-27 23:24:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:18,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:20,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:20,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998780475] [2024-06-27 23:24:20,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998780475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:20,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:20,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:24:20,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990568220] [2024-06-27 23:24:20,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:20,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:24:20,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:20,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:24:20,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:24:20,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:24:20,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 223 transitions, 2456 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:20,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:20,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:24:20,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:21,707 INFO L124 PetriNetUnfolderBase]: 1865/2989 cut-off events. [2024-06-27 23:24:21,708 INFO L125 PetriNetUnfolderBase]: For 131390/131390 co-relation queries the response was YES. [2024-06-27 23:24:21,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22554 conditions, 2989 events. 1865/2989 cut-off events. For 131390/131390 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15858 event pairs, 424 based on Foata normal form. 4/2979 useless extension candidates. Maximal degree in co-relation 22485. Up to 2489 conditions per place. [2024-06-27 23:24:21,731 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 122 selfloop transitions, 108 changer transitions 0/248 dead transitions. [2024-06-27 23:24:21,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 248 transitions, 3060 flow [2024-06-27 23:24:21,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:24:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:24:21,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:24:21,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 23:24:21,733 INFO L175 Difference]: Start difference. First operand has 149 places, 223 transitions, 2456 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:24:21,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 248 transitions, 3060 flow [2024-06-27 23:24:21,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 248 transitions, 3037 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-27 23:24:21,871 INFO L231 Difference]: Finished difference. Result has 156 places, 225 transitions, 2726 flow [2024-06-27 23:24:21,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2433, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2726, PETRI_PLACES=156, PETRI_TRANSITIONS=225} [2024-06-27 23:24:21,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-27 23:24:21,872 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 225 transitions, 2726 flow [2024-06-27 23:24:21,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:21,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:21,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:21,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:24:21,872 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:21,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:21,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1141047800, now seen corresponding path program 5 times [2024-06-27 23:24:21,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:21,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920253529] [2024-06-27 23:24:21,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:21,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:23,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:23,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920253529] [2024-06-27 23:24:23,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920253529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:23,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:23,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:24:23,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761843923] [2024-06-27 23:24:23,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:23,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:24:23,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:23,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:24:23,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:24:23,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:24:23,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 225 transitions, 2726 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:23,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:23,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:24:23,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:24,732 INFO L124 PetriNetUnfolderBase]: 2087/3245 cut-off events. [2024-06-27 23:24:24,732 INFO L125 PetriNetUnfolderBase]: For 143723/143723 co-relation queries the response was YES. [2024-06-27 23:24:24,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24776 conditions, 3245 events. 2087/3245 cut-off events. For 143723/143723 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16666 event pairs, 476 based on Foata normal form. 2/3233 useless extension candidates. Maximal degree in co-relation 24704. Up to 2726 conditions per place. [2024-06-27 23:24:24,757 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 137 selfloop transitions, 113 changer transitions 0/259 dead transitions. [2024-06-27 23:24:24,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 259 transitions, 3436 flow [2024-06-27 23:24:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:24:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:24:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 23:24:24,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-27 23:24:24,759 INFO L175 Difference]: Start difference. First operand has 156 places, 225 transitions, 2726 flow. Second operand 9 states and 173 transitions. [2024-06-27 23:24:24,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 259 transitions, 3436 flow [2024-06-27 23:24:24,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 259 transitions, 3156 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 23:24:24,908 INFO L231 Difference]: Finished difference. Result has 160 places, 232 transitions, 2807 flow [2024-06-27 23:24:24,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2807, PETRI_PLACES=160, PETRI_TRANSITIONS=232} [2024-06-27 23:24:24,908 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-27 23:24:24,909 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 232 transitions, 2807 flow [2024-06-27 23:24:24,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:24,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:24,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:24,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:24:24,909 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:24,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:24,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1377402898, now seen corresponding path program 2 times [2024-06-27 23:24:24,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:24,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930423315] [2024-06-27 23:24:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:24,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:26,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:26,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930423315] [2024-06-27 23:24:26,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930423315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:26,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:26,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:24:26,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813615341] [2024-06-27 23:24:26,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:26,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:24:26,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:26,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:24:26,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:24:26,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:24:26,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 232 transitions, 2807 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:26,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:26,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:24:26,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:27,628 INFO L124 PetriNetUnfolderBase]: 2104/3270 cut-off events. [2024-06-27 23:24:27,628 INFO L125 PetriNetUnfolderBase]: For 152828/152834 co-relation queries the response was YES. [2024-06-27 23:24:27,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25437 conditions, 3270 events. 2104/3270 cut-off events. For 152828/152834 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16817 event pairs, 467 based on Foata normal form. 8/3270 useless extension candidates. Maximal degree in co-relation 25363. Up to 2906 conditions per place. [2024-06-27 23:24:27,654 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 182 selfloop transitions, 70 changer transitions 0/261 dead transitions. [2024-06-27 23:24:27,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 261 transitions, 3471 flow [2024-06-27 23:24:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:24:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:24:27,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:24:27,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-27 23:24:27,655 INFO L175 Difference]: Start difference. First operand has 160 places, 232 transitions, 2807 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:24:27,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 261 transitions, 3471 flow [2024-06-27 23:24:27,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 261 transitions, 3169 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 23:24:27,791 INFO L231 Difference]: Finished difference. Result has 163 places, 234 transitions, 2724 flow [2024-06-27 23:24:27,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2724, PETRI_PLACES=163, PETRI_TRANSITIONS=234} [2024-06-27 23:24:27,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-27 23:24:27,791 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 234 transitions, 2724 flow [2024-06-27 23:24:27,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:27,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:27,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:27,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:24:27,792 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:27,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:27,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1141220780, now seen corresponding path program 6 times [2024-06-27 23:24:27,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:27,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909679647] [2024-06-27 23:24:27,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:27,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:29,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:29,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909679647] [2024-06-27 23:24:29,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909679647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:29,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:29,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:24:29,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922386270] [2024-06-27 23:24:29,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:29,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:24:29,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:29,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:24:29,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:24:29,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:24:29,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 234 transitions, 2724 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:29,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:29,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:24:29,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:30,562 INFO L124 PetriNetUnfolderBase]: 2133/3316 cut-off events. [2024-06-27 23:24:30,562 INFO L125 PetriNetUnfolderBase]: For 161144/161144 co-relation queries the response was YES. [2024-06-27 23:24:30,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25850 conditions, 3316 events. 2133/3316 cut-off events. For 161144/161144 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 17004 event pairs, 445 based on Foata normal form. 2/3304 useless extension candidates. Maximal degree in co-relation 25775. Up to 2788 conditions per place. [2024-06-27 23:24:30,589 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 143 selfloop transitions, 115 changer transitions 0/267 dead transitions. [2024-06-27 23:24:30,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 267 transitions, 3450 flow [2024-06-27 23:24:30,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:24:30,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:24:30,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 23:24:30,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 23:24:30,591 INFO L175 Difference]: Start difference. First operand has 163 places, 234 transitions, 2724 flow. Second operand 9 states and 174 transitions. [2024-06-27 23:24:30,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 267 transitions, 3450 flow [2024-06-27 23:24:30,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 267 transitions, 3249 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 23:24:30,757 INFO L231 Difference]: Finished difference. Result has 165 places, 240 transitions, 2877 flow [2024-06-27 23:24:30,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2523, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2877, PETRI_PLACES=165, PETRI_TRANSITIONS=240} [2024-06-27 23:24:30,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-27 23:24:30,758 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 240 transitions, 2877 flow [2024-06-27 23:24:30,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:30,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:30,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:30,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:24:30,759 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:30,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:30,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1377699568, now seen corresponding path program 3 times [2024-06-27 23:24:30,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:30,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505808939] [2024-06-27 23:24:30,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:30,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:32,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:32,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505808939] [2024-06-27 23:24:32,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505808939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:32,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:32,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:24:32,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980829274] [2024-06-27 23:24:32,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:32,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:24:32,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:32,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:24:32,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:24:32,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:24:32,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 240 transitions, 2877 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:32,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:32,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:24:32,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:33,451 INFO L124 PetriNetUnfolderBase]: 2150/3346 cut-off events. [2024-06-27 23:24:33,451 INFO L125 PetriNetUnfolderBase]: For 172599/172605 co-relation queries the response was YES. [2024-06-27 23:24:33,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26591 conditions, 3346 events. 2150/3346 cut-off events. For 172599/172605 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 17274 event pairs, 399 based on Foata normal form. 8/3346 useless extension candidates. Maximal degree in co-relation 26515. Up to 2876 conditions per place. [2024-06-27 23:24:33,479 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 189 selfloop transitions, 77 changer transitions 0/275 dead transitions. [2024-06-27 23:24:33,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 275 transitions, 3819 flow [2024-06-27 23:24:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:24:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:24:33,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 23:24:33,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-27 23:24:33,484 INFO L175 Difference]: Start difference. First operand has 165 places, 240 transitions, 2877 flow. Second operand 9 states and 172 transitions. [2024-06-27 23:24:33,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 275 transitions, 3819 flow [2024-06-27 23:24:33,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 275 transitions, 3523 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 23:24:33,648 INFO L231 Difference]: Finished difference. Result has 170 places, 245 transitions, 2937 flow [2024-06-27 23:24:33,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2581, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2937, PETRI_PLACES=170, PETRI_TRANSITIONS=245} [2024-06-27 23:24:33,649 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-27 23:24:33,649 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 245 transitions, 2937 flow [2024-06-27 23:24:33,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:33,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:33,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:33,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:24:33,649 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:33,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:33,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1141227290, now seen corresponding path program 7 times [2024-06-27 23:24:33,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:33,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17582682] [2024-06-27 23:24:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:33,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:35,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:35,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17582682] [2024-06-27 23:24:35,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17582682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:35,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:35,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:24:35,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069992915] [2024-06-27 23:24:35,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:35,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:24:35,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:35,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:24:35,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:24:35,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:24:35,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 245 transitions, 2937 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:35,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:35,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:24:35,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:36,300 INFO L124 PetriNetUnfolderBase]: 2161/3364 cut-off events. [2024-06-27 23:24:36,300 INFO L125 PetriNetUnfolderBase]: For 180519/180519 co-relation queries the response was YES. [2024-06-27 23:24:36,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27026 conditions, 3364 events. 2161/3364 cut-off events. For 180519/180519 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17324 event pairs, 445 based on Foata normal form. 2/3352 useless extension candidates. Maximal degree in co-relation 26948. Up to 2804 conditions per place. [2024-06-27 23:24:36,325 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 143 selfloop transitions, 123 changer transitions 0/275 dead transitions. [2024-06-27 23:24:36,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 275 transitions, 3667 flow [2024-06-27 23:24:36,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:24:36,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:24:36,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 23:24:36,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-27 23:24:36,326 INFO L175 Difference]: Start difference. First operand has 170 places, 245 transitions, 2937 flow. Second operand 9 states and 175 transitions. [2024-06-27 23:24:36,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 275 transitions, 3667 flow [2024-06-27 23:24:36,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 275 transitions, 3492 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-27 23:24:36,489 INFO L231 Difference]: Finished difference. Result has 174 places, 248 transitions, 3120 flow [2024-06-27 23:24:36,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2762, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3120, PETRI_PLACES=174, PETRI_TRANSITIONS=248} [2024-06-27 23:24:36,490 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-27 23:24:36,490 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 248 transitions, 3120 flow [2024-06-27 23:24:36,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:36,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:36,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:36,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:24:36,490 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:36,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:36,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1377402650, now seen corresponding path program 8 times [2024-06-27 23:24:36,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:36,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089280423] [2024-06-27 23:24:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:36,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:38,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:38,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089280423] [2024-06-27 23:24:38,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089280423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:38,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:38,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:24:38,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814923987] [2024-06-27 23:24:38,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:38,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:24:38,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:38,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:24:38,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:24:38,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:24:38,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 248 transitions, 3120 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:38,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:38,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:24:38,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:39,247 INFO L124 PetriNetUnfolderBase]: 2165/3373 cut-off events. [2024-06-27 23:24:39,247 INFO L125 PetriNetUnfolderBase]: For 189971/189971 co-relation queries the response was YES. [2024-06-27 23:24:39,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27782 conditions, 3373 events. 2165/3373 cut-off events. For 189971/189971 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17488 event pairs, 481 based on Foata normal form. 2/3361 useless extension candidates. Maximal degree in co-relation 27702. Up to 2658 conditions per place. [2024-06-27 23:24:39,276 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 111 selfloop transitions, 167 changer transitions 0/287 dead transitions. [2024-06-27 23:24:39,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 287 transitions, 4172 flow [2024-06-27 23:24:39,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:24:39,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:24:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 23:24:39,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47696476964769646 [2024-06-27 23:24:39,278 INFO L175 Difference]: Start difference. First operand has 174 places, 248 transitions, 3120 flow. Second operand 9 states and 176 transitions. [2024-06-27 23:24:39,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 287 transitions, 4172 flow [2024-06-27 23:24:39,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 287 transitions, 3830 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 23:24:39,462 INFO L231 Difference]: Finished difference. Result has 177 places, 259 transitions, 3429 flow [2024-06-27 23:24:39,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2786, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3429, PETRI_PLACES=177, PETRI_TRANSITIONS=259} [2024-06-27 23:24:39,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-27 23:24:39,463 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 259 transitions, 3429 flow [2024-06-27 23:24:39,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:39,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:39,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:39,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:24:39,464 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:39,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1029492390, now seen corresponding path program 4 times [2024-06-27 23:24:39,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:39,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162327385] [2024-06-27 23:24:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:39,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:41,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:41,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162327385] [2024-06-27 23:24:41,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162327385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:41,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:41,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:24:41,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265254064] [2024-06-27 23:24:41,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:41,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:24:41,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:41,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:24:41,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:24:41,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:24:41,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 259 transitions, 3429 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:41,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:41,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:24:41,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:42,120 INFO L124 PetriNetUnfolderBase]: 2182/3408 cut-off events. [2024-06-27 23:24:42,120 INFO L125 PetriNetUnfolderBase]: For 203050/203056 co-relation queries the response was YES. [2024-06-27 23:24:42,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28840 conditions, 3408 events. 2182/3408 cut-off events. For 203050/203056 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17806 event pairs, 444 based on Foata normal form. 8/3408 useless extension candidates. Maximal degree in co-relation 28758. Up to 3074 conditions per place. [2024-06-27 23:24:42,147 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 229 selfloop transitions, 50 changer transitions 0/288 dead transitions. [2024-06-27 23:24:42,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 288 transitions, 4147 flow [2024-06-27 23:24:42,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:24:42,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:24:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:24:42,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-27 23:24:42,149 INFO L175 Difference]: Start difference. First operand has 177 places, 259 transitions, 3429 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:24:42,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 288 transitions, 4147 flow [2024-06-27 23:24:42,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 288 transitions, 3995 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-27 23:24:42,342 INFO L231 Difference]: Finished difference. Result has 183 places, 261 transitions, 3456 flow [2024-06-27 23:24:42,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3277, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3456, PETRI_PLACES=183, PETRI_TRANSITIONS=261} [2024-06-27 23:24:42,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-27 23:24:42,343 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 261 transitions, 3456 flow [2024-06-27 23:24:42,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:42,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:42,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:42,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:24:42,343 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:42,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1035748252, now seen corresponding path program 9 times [2024-06-27 23:24:42,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:42,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540164346] [2024-06-27 23:24:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:42,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:44,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:44,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540164346] [2024-06-27 23:24:44,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540164346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:44,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:44,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:24:44,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103913952] [2024-06-27 23:24:44,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:44,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:24:44,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:44,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:24:44,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:24:44,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:24:44,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 261 transitions, 3456 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:44,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:44,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:24:44,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:45,468 INFO L124 PetriNetUnfolderBase]: 2209/3444 cut-off events. [2024-06-27 23:24:45,469 INFO L125 PetriNetUnfolderBase]: For 209522/209522 co-relation queries the response was YES. [2024-06-27 23:24:45,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29224 conditions, 3444 events. 2209/3444 cut-off events. For 209522/209522 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17903 event pairs, 444 based on Foata normal form. 2/3432 useless extension candidates. Maximal degree in co-relation 29140. Up to 2886 conditions per place. [2024-06-27 23:24:45,500 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 158 selfloop transitions, 132 changer transitions 0/299 dead transitions. [2024-06-27 23:24:45,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 299 transitions, 4502 flow [2024-06-27 23:24:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:24:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:24:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 23:24:45,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-27 23:24:45,501 INFO L175 Difference]: Start difference. First operand has 183 places, 261 transitions, 3456 flow. Second operand 10 states and 192 transitions. [2024-06-27 23:24:45,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 299 transitions, 4502 flow [2024-06-27 23:24:45,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 299 transitions, 4347 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 23:24:45,728 INFO L231 Difference]: Finished difference. Result has 186 places, 267 transitions, 3783 flow [2024-06-27 23:24:45,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3301, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3783, PETRI_PLACES=186, PETRI_TRANSITIONS=267} [2024-06-27 23:24:45,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-27 23:24:45,729 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 267 transitions, 3783 flow [2024-06-27 23:24:45,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:45,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:45,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:45,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:24:45,730 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:45,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:45,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1369128688, now seen corresponding path program 5 times [2024-06-27 23:24:45,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:45,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852789779] [2024-06-27 23:24:45,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:45,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:47,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:47,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852789779] [2024-06-27 23:24:47,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852789779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:47,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:47,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:24:47,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094929706] [2024-06-27 23:24:47,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:47,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:24:47,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:47,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:24:47,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:24:47,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:24:47,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 267 transitions, 3783 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:47,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:47,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:24:47,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:48,527 INFO L124 PetriNetUnfolderBase]: 2233/3488 cut-off events. [2024-06-27 23:24:48,527 INFO L125 PetriNetUnfolderBase]: For 222515/222515 co-relation queries the response was YES. [2024-06-27 23:24:48,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29914 conditions, 3488 events. 2233/3488 cut-off events. For 222515/222515 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18229 event pairs, 449 based on Foata normal form. 4/3478 useless extension candidates. Maximal degree in co-relation 29829. Up to 3023 conditions per place. [2024-06-27 23:24:48,559 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 186 selfloop transitions, 101 changer transitions 0/296 dead transitions. [2024-06-27 23:24:48,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 296 transitions, 4521 flow [2024-06-27 23:24:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:24:48,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:24:48,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 23:24:48,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-27 23:24:48,561 INFO L175 Difference]: Start difference. First operand has 186 places, 267 transitions, 3783 flow. Second operand 10 states and 182 transitions. [2024-06-27 23:24:48,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 296 transitions, 4521 flow [2024-06-27 23:24:48,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 296 transitions, 4276 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 23:24:48,859 INFO L231 Difference]: Finished difference. Result has 191 places, 269 transitions, 3823 flow [2024-06-27 23:24:48,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3823, PETRI_PLACES=191, PETRI_TRANSITIONS=269} [2024-06-27 23:24:48,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-27 23:24:48,860 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 269 transitions, 3823 flow [2024-06-27 23:24:48,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:48,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:48,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:48,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 23:24:48,861 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:48,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:48,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1369121930, now seen corresponding path program 10 times [2024-06-27 23:24:48,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:48,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549271440] [2024-06-27 23:24:48,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:48,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:50,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:50,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549271440] [2024-06-27 23:24:50,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549271440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:50,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:50,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:24:50,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055268726] [2024-06-27 23:24:50,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:50,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:24:50,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:50,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:24:50,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:24:50,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:24:50,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 269 transitions, 3823 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:50,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:50,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:24:50,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:51,516 INFO L124 PetriNetUnfolderBase]: 2221/3464 cut-off events. [2024-06-27 23:24:51,516 INFO L125 PetriNetUnfolderBase]: For 224314/224314 co-relation queries the response was YES. [2024-06-27 23:24:51,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30032 conditions, 3464 events. 2221/3464 cut-off events. For 224314/224314 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 18110 event pairs, 481 based on Foata normal form. 2/3452 useless extension candidates. Maximal degree in co-relation 29945. Up to 2926 conditions per place. [2024-06-27 23:24:51,550 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 160 selfloop transitions, 126 changer transitions 0/295 dead transitions. [2024-06-27 23:24:51,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 295 transitions, 4485 flow [2024-06-27 23:24:51,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:24:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:24:51,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 23:24:51,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-27 23:24:51,551 INFO L175 Difference]: Start difference. First operand has 191 places, 269 transitions, 3823 flow. Second operand 9 states and 172 transitions. [2024-06-27 23:24:51,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 295 transitions, 4485 flow [2024-06-27 23:24:51,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 295 transitions, 4150 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-06-27 23:24:51,856 INFO L231 Difference]: Finished difference. Result has 192 places, 269 transitions, 3748 flow [2024-06-27 23:24:51,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3748, PETRI_PLACES=192, PETRI_TRANSITIONS=269} [2024-06-27 23:24:51,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-27 23:24:51,857 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 269 transitions, 3748 flow [2024-06-27 23:24:51,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:51,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:51,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:51,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 23:24:51,857 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:51,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:51,857 INFO L85 PathProgramCache]: Analyzing trace with hash 731258806, now seen corresponding path program 2 times [2024-06-27 23:24:51,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:51,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79993785] [2024-06-27 23:24:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:51,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:52,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:52,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79993785] [2024-06-27 23:24:52,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79993785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:52,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:52,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:24:52,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615404142] [2024-06-27 23:24:52,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:52,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:24:52,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:52,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:24:52,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:24:53,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:24:53,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 269 transitions, 3748 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:53,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:53,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:24:53,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:53,885 INFO L124 PetriNetUnfolderBase]: 2318/3559 cut-off events. [2024-06-27 23:24:53,886 INFO L125 PetriNetUnfolderBase]: For 229625/229625 co-relation queries the response was YES. [2024-06-27 23:24:53,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30608 conditions, 3559 events. 2318/3559 cut-off events. For 229625/229625 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 18193 event pairs, 476 based on Foata normal form. 2/3547 useless extension candidates. Maximal degree in co-relation 30520. Up to 3365 conditions per place. [2024-06-27 23:24:53,919 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 232 selfloop transitions, 44 changer transitions 0/280 dead transitions. [2024-06-27 23:24:53,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 280 transitions, 4456 flow [2024-06-27 23:24:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:24:53,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:24:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 23:24:53,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44308943089430897 [2024-06-27 23:24:53,920 INFO L175 Difference]: Start difference. First operand has 192 places, 269 transitions, 3748 flow. Second operand 6 states and 109 transitions. [2024-06-27 23:24:53,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 280 transitions, 4456 flow [2024-06-27 23:24:54,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 280 transitions, 4172 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 23:24:54,200 INFO L231 Difference]: Finished difference. Result has 190 places, 269 transitions, 3560 flow [2024-06-27 23:24:54,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3464, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3560, PETRI_PLACES=190, PETRI_TRANSITIONS=269} [2024-06-27 23:24:54,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-27 23:24:54,200 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 269 transitions, 3560 flow [2024-06-27 23:24:54,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:54,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:54,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:54,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 23:24:54,201 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:54,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:54,201 INFO L85 PathProgramCache]: Analyzing trace with hash -724052942, now seen corresponding path program 5 times [2024-06-27 23:24:54,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:54,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491360320] [2024-06-27 23:24:54,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:54,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:55,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:55,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491360320] [2024-06-27 23:24:55,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491360320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:55,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:55,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:24:55,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001863181] [2024-06-27 23:24:55,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:55,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:24:55,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:55,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:24:55,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:24:55,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:24:55,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 269 transitions, 3560 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:55,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:55,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:24:55,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:56,245 INFO L124 PetriNetUnfolderBase]: 2109/3399 cut-off events. [2024-06-27 23:24:56,245 INFO L125 PetriNetUnfolderBase]: For 240965/240967 co-relation queries the response was YES. [2024-06-27 23:24:56,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29389 conditions, 3399 events. 2109/3399 cut-off events. For 240965/240967 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 18786 event pairs, 430 based on Foata normal form. 6/3391 useless extension candidates. Maximal degree in co-relation 29299. Up to 2957 conditions per place. [2024-06-27 23:24:56,278 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 244 selfloop transitions, 46 changer transitions 0/310 dead transitions. [2024-06-27 23:24:56,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 310 transitions, 4364 flow [2024-06-27 23:24:56,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:24:56,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:24:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 23:24:56,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48509485094850946 [2024-06-27 23:24:56,282 INFO L175 Difference]: Start difference. First operand has 190 places, 269 transitions, 3560 flow. Second operand 9 states and 179 transitions. [2024-06-27 23:24:56,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 310 transitions, 4364 flow [2024-06-27 23:24:56,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 310 transitions, 4289 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 23:24:56,665 INFO L231 Difference]: Finished difference. Result has 197 places, 277 transitions, 3726 flow [2024-06-27 23:24:56,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3726, PETRI_PLACES=197, PETRI_TRANSITIONS=277} [2024-06-27 23:24:56,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-27 23:24:56,666 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 277 transitions, 3726 flow [2024-06-27 23:24:56,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:56,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:56,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:56,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 23:24:56,667 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:56,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:56,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1011283018, now seen corresponding path program 6 times [2024-06-27 23:24:56,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:56,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705675718] [2024-06-27 23:24:56,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:56,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:24:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:24:57,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:24:57,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705675718] [2024-06-27 23:24:57,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705675718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:24:57,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:24:57,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:24:57,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82322755] [2024-06-27 23:24:57,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:24:57,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:24:57,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:24:57,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:24:57,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:24:58,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:24:58,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 277 transitions, 3726 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:58,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:24:58,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:24:58,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:24:59,009 INFO L124 PetriNetUnfolderBase]: 2246/3578 cut-off events. [2024-06-27 23:24:59,010 INFO L125 PetriNetUnfolderBase]: For 257357/257359 co-relation queries the response was YES. [2024-06-27 23:24:59,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31210 conditions, 3578 events. 2246/3578 cut-off events. For 257357/257359 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19572 event pairs, 480 based on Foata normal form. 6/3577 useless extension candidates. Maximal degree in co-relation 31117. Up to 3218 conditions per place. [2024-06-27 23:24:59,039 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 240 selfloop transitions, 57 changer transitions 0/312 dead transitions. [2024-06-27 23:24:59,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 312 transitions, 4516 flow [2024-06-27 23:24:59,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:24:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:24:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 23:24:59,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 23:24:59,040 INFO L175 Difference]: Start difference. First operand has 197 places, 277 transitions, 3726 flow. Second operand 9 states and 170 transitions. [2024-06-27 23:24:59,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 312 transitions, 4516 flow [2024-06-27 23:24:59,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 312 transitions, 4363 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 23:24:59,360 INFO L231 Difference]: Finished difference. Result has 200 places, 281 transitions, 3803 flow [2024-06-27 23:24:59,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3803, PETRI_PLACES=200, PETRI_TRANSITIONS=281} [2024-06-27 23:24:59,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-27 23:24:59,361 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 281 transitions, 3803 flow [2024-06-27 23:24:59,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:24:59,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:24:59,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:24:59,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 23:24:59,362 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:24:59,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:24:59,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1009373016, now seen corresponding path program 7 times [2024-06-27 23:24:59,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:24:59,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527573808] [2024-06-27 23:24:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:24:59,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:24:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:00,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:00,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527573808] [2024-06-27 23:25:00,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527573808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:00,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:00,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:25:00,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440281179] [2024-06-27 23:25:00,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:00,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:25:00,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:00,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:25:00,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:25:00,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-27 23:25:00,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 281 transitions, 3803 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:00,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:00,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-27 23:25:00,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:01,176 INFO L124 PetriNetUnfolderBase]: 1880/3248 cut-off events. [2024-06-27 23:25:01,176 INFO L125 PetriNetUnfolderBase]: For 261176/261249 co-relation queries the response was YES. [2024-06-27 23:25:01,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28121 conditions, 3248 events. 1880/3248 cut-off events. For 261176/261249 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19669 event pairs, 272 based on Foata normal form. 40/3267 useless extension candidates. Maximal degree in co-relation 28027. Up to 2179 conditions per place. [2024-06-27 23:25:01,205 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 162 selfloop transitions, 66 changer transitions 0/317 dead transitions. [2024-06-27 23:25:01,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 317 transitions, 4487 flow [2024-06-27 23:25:01,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:25:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:25:01,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-27 23:25:01,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-27 23:25:01,207 INFO L175 Difference]: Start difference. First operand has 200 places, 281 transitions, 3803 flow. Second operand 8 states and 178 transitions. [2024-06-27 23:25:01,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 317 transitions, 4487 flow [2024-06-27 23:25:01,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 317 transitions, 4305 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 23:25:01,590 INFO L231 Difference]: Finished difference. Result has 202 places, 290 transitions, 3956 flow [2024-06-27 23:25:01,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3621, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3956, PETRI_PLACES=202, PETRI_TRANSITIONS=290} [2024-06-27 23:25:01,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-27 23:25:01,591 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 290 transitions, 3956 flow [2024-06-27 23:25:01,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:01,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:01,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:01,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 23:25:01,592 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:01,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:01,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1224048626, now seen corresponding path program 11 times [2024-06-27 23:25:01,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:01,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568421629] [2024-06-27 23:25:01,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:01,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:03,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:03,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568421629] [2024-06-27 23:25:03,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568421629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:03,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:03,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:25:03,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356809972] [2024-06-27 23:25:03,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:03,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:25:03,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:03,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:25:03,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:25:03,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:25:03,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 290 transitions, 3956 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:03,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:03,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:25:03,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:04,298 INFO L124 PetriNetUnfolderBase]: 2465/3869 cut-off events. [2024-06-27 23:25:04,298 INFO L125 PetriNetUnfolderBase]: For 278487/278489 co-relation queries the response was YES. [2024-06-27 23:25:04,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33288 conditions, 3869 events. 2465/3869 cut-off events. For 278487/278489 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20990 event pairs, 548 based on Foata normal form. 4/3870 useless extension candidates. Maximal degree in co-relation 33192. Up to 3541 conditions per place. [2024-06-27 23:25:04,338 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 262 selfloop transitions, 61 changer transitions 0/332 dead transitions. [2024-06-27 23:25:04,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 332 transitions, 4860 flow [2024-06-27 23:25:04,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:25:04,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:25:04,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 23:25:04,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-27 23:25:04,340 INFO L175 Difference]: Start difference. First operand has 202 places, 290 transitions, 3956 flow. Second operand 10 states and 187 transitions. [2024-06-27 23:25:04,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 332 transitions, 4860 flow [2024-06-27 23:25:04,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 332 transitions, 4702 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-27 23:25:04,701 INFO L231 Difference]: Finished difference. Result has 209 places, 298 transitions, 4104 flow [2024-06-27 23:25:04,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3810, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4104, PETRI_PLACES=209, PETRI_TRANSITIONS=298} [2024-06-27 23:25:04,701 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-27 23:25:04,701 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 298 transitions, 4104 flow [2024-06-27 23:25:04,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:04,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:04,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:04,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 23:25:04,702 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:04,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:04,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1596884780, now seen corresponding path program 8 times [2024-06-27 23:25:04,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:04,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599050206] [2024-06-27 23:25:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:04,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:05,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:05,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599050206] [2024-06-27 23:25:05,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599050206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:05,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:05,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:25:05,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909503089] [2024-06-27 23:25:05,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:05,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:25:05,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:25:05,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:25:06,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:25:06,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 298 transitions, 4104 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:06,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:06,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:25:06,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:07,060 INFO L124 PetriNetUnfolderBase]: 2324/3785 cut-off events. [2024-06-27 23:25:07,060 INFO L125 PetriNetUnfolderBase]: For 277097/277099 co-relation queries the response was YES. [2024-06-27 23:25:07,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32590 conditions, 3785 events. 2324/3785 cut-off events. For 277097/277099 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 21784 event pairs, 453 based on Foata normal form. 6/3784 useless extension candidates. Maximal degree in co-relation 32492. Up to 3248 conditions per place. [2024-06-27 23:25:07,097 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 268 selfloop transitions, 53 changer transitions 0/343 dead transitions. [2024-06-27 23:25:07,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 343 transitions, 5063 flow [2024-06-27 23:25:07,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:25:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:25:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 23:25:07,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48509485094850946 [2024-06-27 23:25:07,098 INFO L175 Difference]: Start difference. First operand has 209 places, 298 transitions, 4104 flow. Second operand 9 states and 179 transitions. [2024-06-27 23:25:07,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 343 transitions, 5063 flow [2024-06-27 23:25:07,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 343 transitions, 4923 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 23:25:07,504 INFO L231 Difference]: Finished difference. Result has 213 places, 312 transitions, 4341 flow [2024-06-27 23:25:07,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3964, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4341, PETRI_PLACES=213, PETRI_TRANSITIONS=312} [2024-06-27 23:25:07,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-27 23:25:07,505 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 312 transitions, 4341 flow [2024-06-27 23:25:07,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:07,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:07,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:07,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 23:25:07,505 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:07,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:07,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1596824330, now seen corresponding path program 9 times [2024-06-27 23:25:07,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:07,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226094611] [2024-06-27 23:25:07,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:07,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:08,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:08,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226094611] [2024-06-27 23:25:08,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226094611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:08,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:08,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:25:08,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415419678] [2024-06-27 23:25:08,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:08,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:25:08,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:08,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:25:08,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:25:08,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:25:08,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 312 transitions, 4341 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:08,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:08,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:25:08,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:09,909 INFO L124 PetriNetUnfolderBase]: 2391/3899 cut-off events. [2024-06-27 23:25:09,909 INFO L125 PetriNetUnfolderBase]: For 298210/298212 co-relation queries the response was YES. [2024-06-27 23:25:09,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33815 conditions, 3899 events. 2391/3899 cut-off events. For 298210/298212 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22662 event pairs, 477 based on Foata normal form. 10/3904 useless extension candidates. Maximal degree in co-relation 33715. Up to 3364 conditions per place. [2024-06-27 23:25:09,949 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 267 selfloop transitions, 58 changer transitions 0/347 dead transitions. [2024-06-27 23:25:09,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 347 transitions, 5207 flow [2024-06-27 23:25:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:25:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:25:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 23:25:09,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823848238482385 [2024-06-27 23:25:09,951 INFO L175 Difference]: Start difference. First operand has 213 places, 312 transitions, 4341 flow. Second operand 9 states and 178 transitions. [2024-06-27 23:25:09,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 347 transitions, 5207 flow [2024-06-27 23:25:10,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 347 transitions, 5036 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 23:25:10,399 INFO L231 Difference]: Finished difference. Result has 217 places, 318 transitions, 4436 flow [2024-06-27 23:25:10,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4436, PETRI_PLACES=217, PETRI_TRANSITIONS=318} [2024-06-27 23:25:10,399 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-27 23:25:10,399 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 318 transitions, 4436 flow [2024-06-27 23:25:10,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:10,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:10,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:10,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 23:25:10,400 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:10,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:10,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1478736650, now seen corresponding path program 10 times [2024-06-27 23:25:10,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:10,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692763373] [2024-06-27 23:25:10,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:10,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:11,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:11,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692763373] [2024-06-27 23:25:11,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692763373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:11,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:11,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:25:11,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246694789] [2024-06-27 23:25:11,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:11,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:25:11,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:11,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:25:11,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:25:11,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 23:25:11,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 318 transitions, 4436 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:11,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:11,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 23:25:11,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:12,980 INFO L124 PetriNetUnfolderBase]: 2386/3888 cut-off events. [2024-06-27 23:25:12,981 INFO L125 PetriNetUnfolderBase]: For 297428/297428 co-relation queries the response was YES. [2024-06-27 23:25:13,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33322 conditions, 3888 events. 2386/3888 cut-off events. For 297428/297428 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 22577 event pairs, 473 based on Foata normal form. 8/3886 useless extension candidates. Maximal degree in co-relation 33221. Up to 3316 conditions per place. [2024-06-27 23:25:13,018 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 242 selfloop transitions, 87 changer transitions 0/351 dead transitions. [2024-06-27 23:25:13,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 351 transitions, 5296 flow [2024-06-27 23:25:13,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:25:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:25:13,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 23:25:13,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823848238482385 [2024-06-27 23:25:13,020 INFO L175 Difference]: Start difference. First operand has 217 places, 318 transitions, 4436 flow. Second operand 9 states and 178 transitions. [2024-06-27 23:25:13,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 351 transitions, 5296 flow [2024-06-27 23:25:13,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 351 transitions, 5114 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 23:25:13,349 INFO L231 Difference]: Finished difference. Result has 219 places, 322 transitions, 4555 flow [2024-06-27 23:25:13,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4555, PETRI_PLACES=219, PETRI_TRANSITIONS=322} [2024-06-27 23:25:13,349 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-27 23:25:13,350 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 322 transitions, 4555 flow [2024-06-27 23:25:13,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:13,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:13,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:13,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 23:25:13,350 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:13,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:13,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1528611800, now seen corresponding path program 12 times [2024-06-27 23:25:13,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:13,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992879284] [2024-06-27 23:25:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:13,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:14,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:14,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992879284] [2024-06-27 23:25:14,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992879284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:14,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:14,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:25:14,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599715227] [2024-06-27 23:25:14,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:14,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:25:14,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:14,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:25:14,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:25:15,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:25:15,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 322 transitions, 4555 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:15,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:15,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:25:15,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:16,146 INFO L124 PetriNetUnfolderBase]: 2692/4213 cut-off events. [2024-06-27 23:25:16,146 INFO L125 PetriNetUnfolderBase]: For 297971/297973 co-relation queries the response was YES. [2024-06-27 23:25:16,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34984 conditions, 4213 events. 2692/4213 cut-off events. For 297971/297973 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 23236 event pairs, 548 based on Foata normal form. 4/4214 useless extension candidates. Maximal degree in co-relation 34882. Up to 3891 conditions per place. [2024-06-27 23:25:16,191 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 289 selfloop transitions, 64 changer transitions 0/362 dead transitions. [2024-06-27 23:25:16,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 362 transitions, 5468 flow [2024-06-27 23:25:16,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:25:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:25:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 23:25:16,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-27 23:25:16,192 INFO L175 Difference]: Start difference. First operand has 219 places, 322 transitions, 4555 flow. Second operand 10 states and 187 transitions. [2024-06-27 23:25:16,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 362 transitions, 5468 flow [2024-06-27 23:25:16,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 362 transitions, 5189 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-27 23:25:16,773 INFO L231 Difference]: Finished difference. Result has 223 places, 330 transitions, 4549 flow [2024-06-27 23:25:16,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4276, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4549, PETRI_PLACES=223, PETRI_TRANSITIONS=330} [2024-06-27 23:25:16,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-27 23:25:16,773 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 330 transitions, 4549 flow [2024-06-27 23:25:16,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:16,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:16,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:16,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 23:25:16,774 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:16,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:16,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1478731690, now seen corresponding path program 13 times [2024-06-27 23:25:16,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:16,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802042721] [2024-06-27 23:25:16,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:16,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:18,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:18,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802042721] [2024-06-27 23:25:18,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802042721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:18,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:18,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:25:18,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115474883] [2024-06-27 23:25:18,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:18,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:25:18,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:18,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:25:18,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:25:19,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:25:19,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 330 transitions, 4549 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:19,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:19,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:25:19,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:20,504 INFO L124 PetriNetUnfolderBase]: 2721/4253 cut-off events. [2024-06-27 23:25:20,505 INFO L125 PetriNetUnfolderBase]: For 303660/303660 co-relation queries the response was YES. [2024-06-27 23:25:20,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35138 conditions, 4253 events. 2721/4253 cut-off events. For 303660/303660 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 23478 event pairs, 523 based on Foata normal form. 2/4252 useless extension candidates. Maximal degree in co-relation 35034. Up to 3840 conditions per place. [2024-06-27 23:25:20,544 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 269 selfloop transitions, 94 changer transitions 0/372 dead transitions. [2024-06-27 23:25:20,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 372 transitions, 5553 flow [2024-06-27 23:25:20,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:25:20,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:25:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 23:25:20,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-27 23:25:20,546 INFO L175 Difference]: Start difference. First operand has 223 places, 330 transitions, 4549 flow. Second operand 10 states and 189 transitions. [2024-06-27 23:25:20,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 372 transitions, 5553 flow [2024-06-27 23:25:21,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 372 transitions, 5278 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-27 23:25:21,148 INFO L231 Difference]: Finished difference. Result has 224 places, 340 transitions, 4674 flow [2024-06-27 23:25:21,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4274, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4674, PETRI_PLACES=224, PETRI_TRANSITIONS=340} [2024-06-27 23:25:21,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-27 23:25:21,149 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 340 transitions, 4674 flow [2024-06-27 23:25:21,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:21,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:21,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:21,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 23:25:21,150 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:21,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:21,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1478558710, now seen corresponding path program 14 times [2024-06-27 23:25:21,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:21,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184536479] [2024-06-27 23:25:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:21,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:23,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:23,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184536479] [2024-06-27 23:25:23,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184536479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:23,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:23,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:25:23,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260019099] [2024-06-27 23:25:23,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:23,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:25:23,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:23,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:25:23,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:25:23,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:25:23,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 340 transitions, 4674 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:23,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:23,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:25:23,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:24,606 INFO L124 PetriNetUnfolderBase]: 2732/4277 cut-off events. [2024-06-27 23:25:24,606 INFO L125 PetriNetUnfolderBase]: For 311855/311855 co-relation queries the response was YES. [2024-06-27 23:25:24,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35555 conditions, 4277 events. 2732/4277 cut-off events. For 311855/311855 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23731 event pairs, 572 based on Foata normal form. 2/4276 useless extension candidates. Maximal degree in co-relation 35450. Up to 3859 conditions per place. [2024-06-27 23:25:24,650 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 270 selfloop transitions, 99 changer transitions 0/378 dead transitions. [2024-06-27 23:25:24,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 378 transitions, 5655 flow [2024-06-27 23:25:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:25:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:25:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 23:25:24,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-27 23:25:24,651 INFO L175 Difference]: Start difference. First operand has 224 places, 340 transitions, 4674 flow. Second operand 10 states and 188 transitions. [2024-06-27 23:25:24,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 378 transitions, 5655 flow [2024-06-27 23:25:25,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 378 transitions, 5341 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-27 23:25:25,140 INFO L231 Difference]: Finished difference. Result has 226 places, 346 transitions, 4717 flow [2024-06-27 23:25:25,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4360, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4717, PETRI_PLACES=226, PETRI_TRANSITIONS=346} [2024-06-27 23:25:25,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-27 23:25:25,141 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 346 transitions, 4717 flow [2024-06-27 23:25:25,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:25,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:25,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:25,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 23:25:25,142 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:25,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:25,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1478552200, now seen corresponding path program 15 times [2024-06-27 23:25:25,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:25,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803652227] [2024-06-27 23:25:25,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:25,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:26,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:26,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803652227] [2024-06-27 23:25:26,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803652227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:26,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:26,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:25:26,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048077863] [2024-06-27 23:25:26,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:26,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:25:26,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:26,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:25:26,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:25:27,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:25:27,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 346 transitions, 4717 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:27,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:27,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:25:27,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:28,144 INFO L124 PetriNetUnfolderBase]: 2734/4283 cut-off events. [2024-06-27 23:25:28,144 INFO L125 PetriNetUnfolderBase]: For 318042/318042 co-relation queries the response was YES. [2024-06-27 23:25:28,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35413 conditions, 4283 events. 2734/4283 cut-off events. For 318042/318042 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 23837 event pairs, 567 based on Foata normal form. 2/4282 useless extension candidates. Maximal degree in co-relation 35308. Up to 3787 conditions per place. [2024-06-27 23:25:28,187 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 242 selfloop transitions, 130 changer transitions 0/381 dead transitions. [2024-06-27 23:25:28,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 381 transitions, 5590 flow [2024-06-27 23:25:28,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:25:28,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:25:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 23:25:28,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-27 23:25:28,189 INFO L175 Difference]: Start difference. First operand has 226 places, 346 transitions, 4717 flow. Second operand 10 states and 189 transitions. [2024-06-27 23:25:28,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 381 transitions, 5590 flow [2024-06-27 23:25:28,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 381 transitions, 5246 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-27 23:25:28,750 INFO L231 Difference]: Finished difference. Result has 229 places, 349 transitions, 4672 flow [2024-06-27 23:25:28,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4373, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4672, PETRI_PLACES=229, PETRI_TRANSITIONS=349} [2024-06-27 23:25:28,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-27 23:25:28,751 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 349 transitions, 4672 flow [2024-06-27 23:25:28,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:28,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:28,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:28,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 23:25:28,752 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:28,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:28,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1478551952, now seen corresponding path program 6 times [2024-06-27 23:25:28,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:28,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559761243] [2024-06-27 23:25:28,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:28,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:30,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:30,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559761243] [2024-06-27 23:25:30,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559761243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:30,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:30,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:25:30,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204853581] [2024-06-27 23:25:30,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:30,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:25:30,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:30,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:25:30,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:25:30,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:25:30,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 349 transitions, 4672 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:30,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:30,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:25:30,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:31,613 INFO L124 PetriNetUnfolderBase]: 2833/4448 cut-off events. [2024-06-27 23:25:31,613 INFO L125 PetriNetUnfolderBase]: For 354976/354976 co-relation queries the response was YES. [2024-06-27 23:25:31,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36790 conditions, 4448 events. 2833/4448 cut-off events. For 354976/354976 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25005 event pairs, 581 based on Foata normal form. 20/4465 useless extension candidates. Maximal degree in co-relation 36684. Up to 3842 conditions per place. [2024-06-27 23:25:31,660 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 276 selfloop transitions, 104 changer transitions 0/389 dead transitions. [2024-06-27 23:25:31,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 389 transitions, 5726 flow [2024-06-27 23:25:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:25:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:25:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 23:25:31,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-27 23:25:31,662 INFO L175 Difference]: Start difference. First operand has 229 places, 349 transitions, 4672 flow. Second operand 10 states and 192 transitions. [2024-06-27 23:25:31,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 389 transitions, 5726 flow [2024-06-27 23:25:32,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 389 transitions, 5068 flow, removed 79 selfloop flow, removed 11 redundant places. [2024-06-27 23:25:32,205 INFO L231 Difference]: Finished difference. Result has 228 places, 353 transitions, 4386 flow [2024-06-27 23:25:32,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4036, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4386, PETRI_PLACES=228, PETRI_TRANSITIONS=353} [2024-06-27 23:25:32,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-27 23:25:32,205 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 353 transitions, 4386 flow [2024-06-27 23:25:32,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:32,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:32,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:32,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 23:25:32,206 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:32,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:32,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1886134774, now seen corresponding path program 3 times [2024-06-27 23:25:32,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:32,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819807618] [2024-06-27 23:25:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:32,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:33,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:33,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819807618] [2024-06-27 23:25:33,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819807618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:33,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:33,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:25:33,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035082719] [2024-06-27 23:25:33,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:33,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:25:33,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:33,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:25:33,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:25:33,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:25:33,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 353 transitions, 4386 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:33,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:33,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:25:33,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:34,212 INFO L124 PetriNetUnfolderBase]: 2940/4557 cut-off events. [2024-06-27 23:25:34,212 INFO L125 PetriNetUnfolderBase]: For 339793/339793 co-relation queries the response was YES. [2024-06-27 23:25:34,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36790 conditions, 4557 events. 2940/4557 cut-off events. For 339793/339793 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25189 event pairs, 621 based on Foata normal form. 2/4556 useless extension candidates. Maximal degree in co-relation 36685. Up to 4342 conditions per place. [2024-06-27 23:25:34,259 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 324 selfloop transitions, 47 changer transitions 0/375 dead transitions. [2024-06-27 23:25:34,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 375 transitions, 5254 flow [2024-06-27 23:25:34,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:25:34,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:25:34,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 23:25:34,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-27 23:25:34,260 INFO L175 Difference]: Start difference. First operand has 228 places, 353 transitions, 4386 flow. Second operand 7 states and 128 transitions. [2024-06-27 23:25:34,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 375 transitions, 5254 flow [2024-06-27 23:25:34,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 375 transitions, 4992 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-27 23:25:34,713 INFO L231 Difference]: Finished difference. Result has 227 places, 356 transitions, 4261 flow [2024-06-27 23:25:34,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4261, PETRI_PLACES=227, PETRI_TRANSITIONS=356} [2024-06-27 23:25:34,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-27 23:25:34,714 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 356 transitions, 4261 flow [2024-06-27 23:25:34,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:34,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:34,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:34,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 23:25:34,715 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:34,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:34,715 INFO L85 PathProgramCache]: Analyzing trace with hash 725550838, now seen corresponding path program 1 times [2024-06-27 23:25:34,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:34,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312959188] [2024-06-27 23:25:34,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:34,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:35,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:35,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312959188] [2024-06-27 23:25:35,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312959188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:35,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:35,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:25:35,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362794411] [2024-06-27 23:25:35,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:35,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:25:35,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:35,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:25:35,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:25:35,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:25:35,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 356 transitions, 4261 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:35,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:35,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:25:35,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:36,617 INFO L124 PetriNetUnfolderBase]: 2741/4345 cut-off events. [2024-06-27 23:25:36,617 INFO L125 PetriNetUnfolderBase]: For 292020/292020 co-relation queries the response was YES. [2024-06-27 23:25:36,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33362 conditions, 4345 events. 2741/4345 cut-off events. For 292020/292020 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24743 event pairs, 870 based on Foata normal form. 1/4343 useless extension candidates. Maximal degree in co-relation 33256. Up to 4138 conditions per place. [2024-06-27 23:25:36,662 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 351 selfloop transitions, 18 changer transitions 0/374 dead transitions. [2024-06-27 23:25:36,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 374 transitions, 5205 flow [2024-06-27 23:25:36,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:25:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:25:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 23:25:36,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-27 23:25:36,663 INFO L175 Difference]: Start difference. First operand has 227 places, 356 transitions, 4261 flow. Second operand 7 states and 122 transitions. [2024-06-27 23:25:36,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 374 transitions, 5205 flow [2024-06-27 23:25:37,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 374 transitions, 5129 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 23:25:37,109 INFO L231 Difference]: Finished difference. Result has 230 places, 362 transitions, 4289 flow [2024-06-27 23:25:37,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4185, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4289, PETRI_PLACES=230, PETRI_TRANSITIONS=362} [2024-06-27 23:25:37,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-27 23:25:37,109 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 362 transitions, 4289 flow [2024-06-27 23:25:37,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:37,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:37,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:37,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 23:25:37,110 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:37,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:37,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2020254058, now seen corresponding path program 2 times [2024-06-27 23:25:37,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:37,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813438540] [2024-06-27 23:25:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:37,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:38,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:38,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813438540] [2024-06-27 23:25:38,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813438540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:38,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:38,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:25:38,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531983484] [2024-06-27 23:25:38,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:38,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:25:38,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:38,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:25:38,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:25:38,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:25:38,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 362 transitions, 4289 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:38,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:38,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:25:38,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:39,008 INFO L124 PetriNetUnfolderBase]: 2738/4341 cut-off events. [2024-06-27 23:25:39,008 INFO L125 PetriNetUnfolderBase]: For 299631/299631 co-relation queries the response was YES. [2024-06-27 23:25:39,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33729 conditions, 4341 events. 2738/4341 cut-off events. For 299631/299631 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 24711 event pairs, 869 based on Foata normal form. 1/4339 useless extension candidates. Maximal degree in co-relation 33622. Up to 4147 conditions per place. [2024-06-27 23:25:39,056 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 352 selfloop transitions, 13 changer transitions 0/370 dead transitions. [2024-06-27 23:25:39,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 370 transitions, 5043 flow [2024-06-27 23:25:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:25:39,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:25:39,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 23:25:39,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-27 23:25:39,057 INFO L175 Difference]: Start difference. First operand has 230 places, 362 transitions, 4289 flow. Second operand 7 states and 116 transitions. [2024-06-27 23:25:39,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 370 transitions, 5043 flow [2024-06-27 23:25:39,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 370 transitions, 4992 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 23:25:39,450 INFO L231 Difference]: Finished difference. Result has 234 places, 362 transitions, 4270 flow [2024-06-27 23:25:39,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4238, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4270, PETRI_PLACES=234, PETRI_TRANSITIONS=362} [2024-06-27 23:25:39,450 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-27 23:25:39,450 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 362 transitions, 4270 flow [2024-06-27 23:25:39,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:39,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:39,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:39,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 23:25:39,451 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:39,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:39,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1692527890, now seen corresponding path program 1 times [2024-06-27 23:25:39,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:39,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661056497] [2024-06-27 23:25:39,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:39,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:41,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661056497] [2024-06-27 23:25:41,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661056497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:41,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:41,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:25:41,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318635488] [2024-06-27 23:25:41,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:41,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:25:41,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:41,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:25:41,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:25:41,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:25:41,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 362 transitions, 4270 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:41,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:41,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:25:41,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:43,202 INFO L124 PetriNetUnfolderBase]: 2907/4576 cut-off events. [2024-06-27 23:25:43,202 INFO L125 PetriNetUnfolderBase]: For 390610/390610 co-relation queries the response was YES. [2024-06-27 23:25:43,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37428 conditions, 4576 events. 2907/4576 cut-off events. For 390610/390610 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 25936 event pairs, 601 based on Foata normal form. 16/4583 useless extension candidates. Maximal degree in co-relation 37319. Up to 4071 conditions per place. [2024-06-27 23:25:43,249 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 302 selfloop transitions, 83 changer transitions 0/397 dead transitions. [2024-06-27 23:25:43,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 397 transitions, 5266 flow [2024-06-27 23:25:43,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:25:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:25:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 23:25:43,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-27 23:25:43,250 INFO L175 Difference]: Start difference. First operand has 234 places, 362 transitions, 4270 flow. Second operand 10 states and 192 transitions. [2024-06-27 23:25:43,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 397 transitions, 5266 flow [2024-06-27 23:25:43,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 397 transitions, 5232 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:25:43,754 INFO L231 Difference]: Finished difference. Result has 238 places, 363 transitions, 4485 flow [2024-06-27 23:25:43,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4236, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4485, PETRI_PLACES=238, PETRI_TRANSITIONS=363} [2024-06-27 23:25:43,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-27 23:25:43,755 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 363 transitions, 4485 flow [2024-06-27 23:25:43,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:43,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:43,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:43,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 23:25:43,755 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:43,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:43,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1686956260, now seen corresponding path program 2 times [2024-06-27 23:25:43,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:43,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720249476] [2024-06-27 23:25:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:43,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:45,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:45,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720249476] [2024-06-27 23:25:45,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720249476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:45,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:45,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:25:45,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915478846] [2024-06-27 23:25:45,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:45,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:25:45,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:45,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:25:45,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:25:45,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:25:45,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 363 transitions, 4485 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:45,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:45,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:25:45,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:46,992 INFO L124 PetriNetUnfolderBase]: 3041/4808 cut-off events. [2024-06-27 23:25:46,992 INFO L125 PetriNetUnfolderBase]: For 442982/442982 co-relation queries the response was YES. [2024-06-27 23:25:47,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41146 conditions, 4808 events. 3041/4808 cut-off events. For 442982/442982 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27718 event pairs, 623 based on Foata normal form. 12/4803 useless extension candidates. Maximal degree in co-relation 41036. Up to 3831 conditions per place. [2024-06-27 23:25:47,038 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 275 selfloop transitions, 117 changer transitions 0/404 dead transitions. [2024-06-27 23:25:47,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 404 transitions, 5825 flow [2024-06-27 23:25:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:25:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:25:47,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:25:47,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47804878048780486 [2024-06-27 23:25:47,040 INFO L175 Difference]: Start difference. First operand has 238 places, 363 transitions, 4485 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:25:47,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 404 transitions, 5825 flow [2024-06-27 23:25:47,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 404 transitions, 5624 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 23:25:47,617 INFO L231 Difference]: Finished difference. Result has 240 places, 365 transitions, 4675 flow [2024-06-27 23:25:47,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4284, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4675, PETRI_PLACES=240, PETRI_TRANSITIONS=365} [2024-06-27 23:25:47,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-27 23:25:47,618 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 365 transitions, 4675 flow [2024-06-27 23:25:47,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:47,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:47,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:47,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 23:25:47,619 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:47,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:47,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1009640982, now seen corresponding path program 3 times [2024-06-27 23:25:47,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:47,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236364584] [2024-06-27 23:25:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:47,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:49,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:49,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236364584] [2024-06-27 23:25:49,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236364584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:49,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:49,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:25:49,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416183665] [2024-06-27 23:25:49,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:49,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:25:49,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:49,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:25:49,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:25:49,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:25:49,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 365 transitions, 4675 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:49,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:49,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:25:49,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:50,917 INFO L124 PetriNetUnfolderBase]: 3099/4904 cut-off events. [2024-06-27 23:25:50,918 INFO L125 PetriNetUnfolderBase]: For 469247/469247 co-relation queries the response was YES. [2024-06-27 23:25:50,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42177 conditions, 4904 events. 3099/4904 cut-off events. For 469247/469247 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 28422 event pairs, 615 based on Foata normal form. 16/4911 useless extension candidates. Maximal degree in co-relation 42066. Up to 4328 conditions per place. [2024-06-27 23:25:50,971 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 277 selfloop transitions, 111 changer transitions 0/400 dead transitions. [2024-06-27 23:25:50,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 400 transitions, 5681 flow [2024-06-27 23:25:50,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:25:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:25:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 23:25:50,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-27 23:25:50,973 INFO L175 Difference]: Start difference. First operand has 240 places, 365 transitions, 4675 flow. Second operand 10 states and 192 transitions. [2024-06-27 23:25:50,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 400 transitions, 5681 flow [2024-06-27 23:25:52,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 400 transitions, 5491 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 23:25:52,061 INFO L231 Difference]: Finished difference. Result has 244 places, 366 transitions, 4794 flow [2024-06-27 23:25:52,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4487, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4794, PETRI_PLACES=244, PETRI_TRANSITIONS=366} [2024-06-27 23:25:52,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-27 23:25:52,061 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 366 transitions, 4794 flow [2024-06-27 23:25:52,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:52,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:52,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:52,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 23:25:52,062 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:52,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:52,062 INFO L85 PathProgramCache]: Analyzing trace with hash 792318160, now seen corresponding path program 4 times [2024-06-27 23:25:52,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:52,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230356768] [2024-06-27 23:25:52,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:52,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:54,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:54,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230356768] [2024-06-27 23:25:54,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230356768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:54,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:54,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:25:54,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845509682] [2024-06-27 23:25:54,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:54,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:25:54,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:54,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:25:54,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:25:54,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:25:54,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 366 transitions, 4794 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:54,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:54,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:25:54,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:55,621 INFO L124 PetriNetUnfolderBase]: 3064/4853 cut-off events. [2024-06-27 23:25:55,621 INFO L125 PetriNetUnfolderBase]: For 444295/444295 co-relation queries the response was YES. [2024-06-27 23:25:55,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40918 conditions, 4853 events. 3064/4853 cut-off events. For 444295/444295 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28162 event pairs, 598 based on Foata normal form. 16/4860 useless extension candidates. Maximal degree in co-relation 40805. Up to 4338 conditions per place. [2024-06-27 23:25:55,677 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 302 selfloop transitions, 86 changer transitions 0/400 dead transitions. [2024-06-27 23:25:55,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 400 transitions, 5724 flow [2024-06-27 23:25:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:25:55,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:25:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 23:25:55,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-27 23:25:55,678 INFO L175 Difference]: Start difference. First operand has 244 places, 366 transitions, 4794 flow. Second operand 10 states and 191 transitions. [2024-06-27 23:25:55,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 400 transitions, 5724 flow [2024-06-27 23:25:56,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 400 transitions, 5435 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-27 23:25:56,379 INFO L231 Difference]: Finished difference. Result has 246 places, 366 transitions, 4686 flow [2024-06-27 23:25:56,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4505, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4686, PETRI_PLACES=246, PETRI_TRANSITIONS=366} [2024-06-27 23:25:56,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-27 23:25:56,380 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 366 transitions, 4686 flow [2024-06-27 23:25:56,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:56,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:56,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:56,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 23:25:56,380 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:56,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:56,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1394225620, now seen corresponding path program 1 times [2024-06-27 23:25:56,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:56,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964270933] [2024-06-27 23:25:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:56,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:25:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:25:57,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:25:57,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964270933] [2024-06-27 23:25:57,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964270933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:25:57,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:25:57,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:25:57,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704275971] [2024-06-27 23:25:57,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:25:57,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:25:57,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:25:57,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:25:57,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:25:57,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:25:57,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 366 transitions, 4686 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:57,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:25:57,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:25:57,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:25:59,071 INFO L124 PetriNetUnfolderBase]: 3183/4982 cut-off events. [2024-06-27 23:25:59,071 INFO L125 PetriNetUnfolderBase]: For 423304/423304 co-relation queries the response was YES. [2024-06-27 23:25:59,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41545 conditions, 4982 events. 3183/4982 cut-off events. For 423304/423304 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 28460 event pairs, 638 based on Foata normal form. 2/4975 useless extension candidates. Maximal degree in co-relation 41431. Up to 4707 conditions per place. [2024-06-27 23:25:59,126 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 340 selfloop transitions, 51 changer transitions 0/395 dead transitions. [2024-06-27 23:25:59,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 395 transitions, 5986 flow [2024-06-27 23:25:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:25:59,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:25:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 23:25:59,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-27 23:25:59,128 INFO L175 Difference]: Start difference. First operand has 246 places, 366 transitions, 4686 flow. Second operand 7 states and 131 transitions. [2024-06-27 23:25:59,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 395 transitions, 5986 flow [2024-06-27 23:25:59,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 395 transitions, 5780 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 23:25:59,678 INFO L231 Difference]: Finished difference. Result has 245 places, 377 transitions, 4764 flow [2024-06-27 23:25:59,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4480, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4764, PETRI_PLACES=245, PETRI_TRANSITIONS=377} [2024-06-27 23:25:59,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-27 23:25:59,679 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 377 transitions, 4764 flow [2024-06-27 23:25:59,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:25:59,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:25:59,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:25:59,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 23:25:59,680 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:25:59,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:25:59,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1644739942, now seen corresponding path program 5 times [2024-06-27 23:25:59,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:25:59,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682908301] [2024-06-27 23:25:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:25:59,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:25:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:01,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:01,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682908301] [2024-06-27 23:26:01,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682908301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:01,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:01,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:26:01,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164918583] [2024-06-27 23:26:01,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:01,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:26:01,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:01,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:26:01,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:26:01,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:26:01,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 377 transitions, 4764 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:01,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:01,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:26:01,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:03,060 INFO L124 PetriNetUnfolderBase]: 3211/5097 cut-off events. [2024-06-27 23:26:03,061 INFO L125 PetriNetUnfolderBase]: For 496116/496134 co-relation queries the response was YES. [2024-06-27 23:26:03,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44356 conditions, 5097 events. 3211/5097 cut-off events. For 496116/496134 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29964 event pairs, 661 based on Foata normal form. 12/5090 useless extension candidates. Maximal degree in co-relation 44239. Up to 4391 conditions per place. [2024-06-27 23:26:03,111 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 297 selfloop transitions, 109 changer transitions 0/418 dead transitions. [2024-06-27 23:26:03,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 418 transitions, 6156 flow [2024-06-27 23:26:03,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:26:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:26:03,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:26:03,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47804878048780486 [2024-06-27 23:26:03,112 INFO L175 Difference]: Start difference. First operand has 245 places, 377 transitions, 4764 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:26:03,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 418 transitions, 6156 flow [2024-06-27 23:26:03,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 418 transitions, 6098 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 23:26:03,902 INFO L231 Difference]: Finished difference. Result has 252 places, 379 transitions, 5084 flow [2024-06-27 23:26:03,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4706, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5084, PETRI_PLACES=252, PETRI_TRANSITIONS=379} [2024-06-27 23:26:03,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-27 23:26:03,902 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 379 transitions, 5084 flow [2024-06-27 23:26:03,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:03,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:03,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:03,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 23:26:03,903 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:03,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:03,903 INFO L85 PathProgramCache]: Analyzing trace with hash -506689810, now seen corresponding path program 6 times [2024-06-27 23:26:03,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:03,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250763365] [2024-06-27 23:26:03,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:03,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:06,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:06,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250763365] [2024-06-27 23:26:06,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250763365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:06,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:06,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:26:06,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388222817] [2024-06-27 23:26:06,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:06,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:26:06,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:06,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:26:06,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:26:06,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:26:06,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 379 transitions, 5084 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:06,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:06,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:26:06,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:07,633 INFO L124 PetriNetUnfolderBase]: 3183/5053 cut-off events. [2024-06-27 23:26:07,633 INFO L125 PetriNetUnfolderBase]: For 490962/490980 co-relation queries the response was YES. [2024-06-27 23:26:07,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43507 conditions, 5053 events. 3183/5053 cut-off events. For 490962/490980 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 29637 event pairs, 620 based on Foata normal form. 16/5050 useless extension candidates. Maximal degree in co-relation 43388. Up to 4470 conditions per place. [2024-06-27 23:26:07,694 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 294 selfloop transitions, 107 changer transitions 0/413 dead transitions. [2024-06-27 23:26:07,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 413 transitions, 6044 flow [2024-06-27 23:26:07,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:26:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:26:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-27 23:26:07,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-27 23:26:07,695 INFO L175 Difference]: Start difference. First operand has 252 places, 379 transitions, 5084 flow. Second operand 11 states and 201 transitions. [2024-06-27 23:26:07,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 413 transitions, 6044 flow [2024-06-27 23:26:08,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 413 transitions, 5816 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 23:26:08,660 INFO L231 Difference]: Finished difference. Result has 257 places, 379 transitions, 5077 flow [2024-06-27 23:26:08,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4856, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5077, PETRI_PLACES=257, PETRI_TRANSITIONS=379} [2024-06-27 23:26:08,660 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-27 23:26:08,660 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 379 transitions, 5077 flow [2024-06-27 23:26:08,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:08,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:08,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:08,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 23:26:08,661 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:08,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:08,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1012744942, now seen corresponding path program 7 times [2024-06-27 23:26:08,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:08,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554998952] [2024-06-27 23:26:08,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:08,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:11,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:11,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554998952] [2024-06-27 23:26:11,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554998952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:11,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:11,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:26:11,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770196608] [2024-06-27 23:26:11,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:11,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:26:11,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:11,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:26:11,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:26:11,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:26:11,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 379 transitions, 5077 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:11,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:11,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:26:11,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:13,031 INFO L124 PetriNetUnfolderBase]: 3241/5151 cut-off events. [2024-06-27 23:26:13,031 INFO L125 PetriNetUnfolderBase]: For 500071/500089 co-relation queries the response was YES. [2024-06-27 23:26:13,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44393 conditions, 5151 events. 3241/5151 cut-off events. For 500071/500089 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 30541 event pairs, 673 based on Foata normal form. 16/5148 useless extension candidates. Maximal degree in co-relation 44272. Up to 4472 conditions per place. [2024-06-27 23:26:13,081 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 278 selfloop transitions, 124 changer transitions 0/414 dead transitions. [2024-06-27 23:26:13,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 414 transitions, 6117 flow [2024-06-27 23:26:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:26:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:26:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-27 23:26:13,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44789356984478934 [2024-06-27 23:26:13,082 INFO L175 Difference]: Start difference. First operand has 257 places, 379 transitions, 5077 flow. Second operand 11 states and 202 transitions. [2024-06-27 23:26:13,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 414 transitions, 6117 flow [2024-06-27 23:26:13,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 414 transitions, 5898 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-27 23:26:13,971 INFO L231 Difference]: Finished difference. Result has 258 places, 380 transitions, 5193 flow [2024-06-27 23:26:13,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4858, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5193, PETRI_PLACES=258, PETRI_TRANSITIONS=380} [2024-06-27 23:26:13,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-27 23:26:13,972 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 380 transitions, 5193 flow [2024-06-27 23:26:13,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:13,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:13,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:13,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 23:26:13,973 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:13,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:13,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1018107322, now seen corresponding path program 8 times [2024-06-27 23:26:13,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:13,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392763817] [2024-06-27 23:26:13,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:13,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:16,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:16,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392763817] [2024-06-27 23:26:16,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392763817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:16,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:16,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:26:16,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128970765] [2024-06-27 23:26:16,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:16,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:26:16,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:16,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:26:16,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:26:16,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:26:16,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 380 transitions, 5193 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:16,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:16,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:26:16,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:17,956 INFO L124 PetriNetUnfolderBase]: 3299/5249 cut-off events. [2024-06-27 23:26:17,956 INFO L125 PetriNetUnfolderBase]: For 526745/526763 co-relation queries the response was YES. [2024-06-27 23:26:17,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45737 conditions, 5249 events. 3299/5249 cut-off events. For 526745/526763 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31264 event pairs, 640 based on Foata normal form. 16/5246 useless extension candidates. Maximal degree in co-relation 45615. Up to 4570 conditions per place. [2024-06-27 23:26:18,011 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 280 selfloop transitions, 123 changer transitions 0/415 dead transitions. [2024-06-27 23:26:18,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 415 transitions, 6237 flow [2024-06-27 23:26:18,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:26:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:26:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-27 23:26:18,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501108647450111 [2024-06-27 23:26:18,013 INFO L175 Difference]: Start difference. First operand has 258 places, 380 transitions, 5193 flow. Second operand 11 states and 203 transitions. [2024-06-27 23:26:18,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 415 transitions, 6237 flow [2024-06-27 23:26:18,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 415 transitions, 5946 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 23:26:18,692 INFO L231 Difference]: Finished difference. Result has 260 places, 381 transitions, 5237 flow [2024-06-27 23:26:18,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4902, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5237, PETRI_PLACES=260, PETRI_TRANSITIONS=381} [2024-06-27 23:26:18,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-27 23:26:18,693 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 381 transitions, 5237 flow [2024-06-27 23:26:18,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:18,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:18,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:18,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 23:26:18,693 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:18,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:18,694 INFO L85 PathProgramCache]: Analyzing trace with hash -506891620, now seen corresponding path program 9 times [2024-06-27 23:26:18,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:18,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938305974] [2024-06-27 23:26:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:18,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:21,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:21,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938305974] [2024-06-27 23:26:21,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938305974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:21,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:21,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:26:21,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255557332] [2024-06-27 23:26:21,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:21,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:26:21,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:21,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:26:21,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:26:21,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:26:21,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 381 transitions, 5237 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:21,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:21,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:26:21,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:22,747 INFO L124 PetriNetUnfolderBase]: 3357/5357 cut-off events. [2024-06-27 23:26:22,747 INFO L125 PetriNetUnfolderBase]: For 544069/544087 co-relation queries the response was YES. [2024-06-27 23:26:22,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46714 conditions, 5357 events. 3357/5357 cut-off events. For 544069/544087 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32277 event pairs, 698 based on Foata normal form. 16/5354 useless extension candidates. Maximal degree in co-relation 46591. Up to 4668 conditions per place. [2024-06-27 23:26:22,814 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 269 selfloop transitions, 135 changer transitions 0/416 dead transitions. [2024-06-27 23:26:22,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 416 transitions, 6285 flow [2024-06-27 23:26:22,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:26:22,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:26:22,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-27 23:26:22,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-27 23:26:22,816 INFO L175 Difference]: Start difference. First operand has 260 places, 381 transitions, 5237 flow. Second operand 11 states and 201 transitions. [2024-06-27 23:26:22,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 416 transitions, 6285 flow [2024-06-27 23:26:23,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 416 transitions, 5994 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-27 23:26:23,955 INFO L231 Difference]: Finished difference. Result has 262 places, 382 transitions, 5307 flow [2024-06-27 23:26:23,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4946, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5307, PETRI_PLACES=262, PETRI_TRANSITIONS=382} [2024-06-27 23:26:23,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-27 23:26:23,956 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 382 transitions, 5307 flow [2024-06-27 23:26:23,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:23,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:23,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:23,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 23:26:23,956 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:23,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:23,957 INFO L85 PathProgramCache]: Analyzing trace with hash -250181860, now seen corresponding path program 10 times [2024-06-27 23:26:23,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:23,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740329240] [2024-06-27 23:26:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:23,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:25,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:25,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740329240] [2024-06-27 23:26:25,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740329240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:25,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:25,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:26:25,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774341280] [2024-06-27 23:26:25,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:25,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:26:25,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:25,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:26:25,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:26:26,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:26:26,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 382 transitions, 5307 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:26,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:26,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:26:26,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:27,745 INFO L124 PetriNetUnfolderBase]: 3484/5580 cut-off events. [2024-06-27 23:26:27,745 INFO L125 PetriNetUnfolderBase]: For 595382/595400 co-relation queries the response was YES. [2024-06-27 23:26:27,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50056 conditions, 5580 events. 3484/5580 cut-off events. For 595382/595400 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34073 event pairs, 729 based on Foata normal form. 12/5573 useless extension candidates. Maximal degree in co-relation 49932. Up to 4543 conditions per place. [2024-06-27 23:26:27,811 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 200 selfloop transitions, 211 changer transitions 0/423 dead transitions. [2024-06-27 23:26:27,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 423 transitions, 6745 flow [2024-06-27 23:26:27,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:26:27,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:26:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 23:26:27,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-27 23:26:27,813 INFO L175 Difference]: Start difference. First operand has 262 places, 382 transitions, 5307 flow. Second operand 10 states and 198 transitions. [2024-06-27 23:26:27,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 423 transitions, 6745 flow [2024-06-27 23:26:28,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 423 transitions, 6428 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-27 23:26:28,983 INFO L231 Difference]: Finished difference. Result has 263 places, 384 transitions, 5588 flow [2024-06-27 23:26:28,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4990, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5588, PETRI_PLACES=263, PETRI_TRANSITIONS=384} [2024-06-27 23:26:28,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-27 23:26:28,984 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 384 transitions, 5588 flow [2024-06-27 23:26:28,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:28,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:28,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:28,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 23:26:28,984 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:28,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:28,984 INFO L85 PathProgramCache]: Analyzing trace with hash -250189300, now seen corresponding path program 11 times [2024-06-27 23:26:28,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:28,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372885690] [2024-06-27 23:26:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:28,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:31,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:31,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372885690] [2024-06-27 23:26:31,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372885690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:31,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:31,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:26:31,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780683579] [2024-06-27 23:26:31,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:31,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:26:31,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:31,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:26:31,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:26:31,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:26:31,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 384 transitions, 5588 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:31,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:31,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:26:31,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:32,861 INFO L124 PetriNetUnfolderBase]: 3456/5536 cut-off events. [2024-06-27 23:26:32,861 INFO L125 PetriNetUnfolderBase]: For 576907/576925 co-relation queries the response was YES. [2024-06-27 23:26:32,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48646 conditions, 5536 events. 3456/5536 cut-off events. For 576907/576925 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 33772 event pairs, 731 based on Foata normal form. 16/5533 useless extension candidates. Maximal degree in co-relation 48521. Up to 4800 conditions per place. [2024-06-27 23:26:32,929 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 254 selfloop transitions, 152 changer transitions 0/418 dead transitions. [2024-06-27 23:26:32,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 418 transitions, 6558 flow [2024-06-27 23:26:32,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:26:32,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:26:32,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 23:26:32,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47073170731707314 [2024-06-27 23:26:32,931 INFO L175 Difference]: Start difference. First operand has 263 places, 384 transitions, 5588 flow. Second operand 10 states and 193 transitions. [2024-06-27 23:26:32,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 418 transitions, 6558 flow [2024-06-27 23:26:34,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 418 transitions, 6190 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 23:26:34,071 INFO L231 Difference]: Finished difference. Result has 267 places, 384 transitions, 5531 flow [2024-06-27 23:26:34,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5220, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5531, PETRI_PLACES=267, PETRI_TRANSITIONS=384} [2024-06-27 23:26:34,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-27 23:26:34,072 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 384 transitions, 5531 flow [2024-06-27 23:26:34,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:34,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:34,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:34,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 23:26:34,072 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:34,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash -240985090, now seen corresponding path program 12 times [2024-06-27 23:26:34,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:34,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321059086] [2024-06-27 23:26:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:34,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:36,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:36,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321059086] [2024-06-27 23:26:36,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321059086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:36,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:36,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:26:36,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303238647] [2024-06-27 23:26:36,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:36,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:26:36,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:36,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:26:36,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:26:36,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:26:36,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 384 transitions, 5531 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:36,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:36,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:26:36,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:37,818 INFO L124 PetriNetUnfolderBase]: 3558/5720 cut-off events. [2024-06-27 23:26:37,818 INFO L125 PetriNetUnfolderBase]: For 609295/609313 co-relation queries the response was YES. [2024-06-27 23:26:37,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51152 conditions, 5720 events. 3558/5720 cut-off events. For 609295/609313 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 35090 event pairs, 691 based on Foata normal form. 12/5713 useless extension candidates. Maximal degree in co-relation 51025. Up to 3275 conditions per place. [2024-06-27 23:26:37,884 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 182 selfloop transitions, 232 changer transitions 0/426 dead transitions. [2024-06-27 23:26:37,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 426 transitions, 6989 flow [2024-06-27 23:26:37,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:26:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:26:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 23:26:37,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-27 23:26:37,886 INFO L175 Difference]: Start difference. First operand has 267 places, 384 transitions, 5531 flow. Second operand 10 states and 198 transitions. [2024-06-27 23:26:37,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 426 transitions, 6989 flow [2024-06-27 23:26:38,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 426 transitions, 6678 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 23:26:38,935 INFO L231 Difference]: Finished difference. Result has 268 places, 386 transitions, 5864 flow [2024-06-27 23:26:38,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5220, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5864, PETRI_PLACES=268, PETRI_TRANSITIONS=386} [2024-06-27 23:26:38,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-27 23:26:38,935 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 386 transitions, 5864 flow [2024-06-27 23:26:38,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:38,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:38,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:38,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 23:26:38,936 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:38,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1849494280, now seen corresponding path program 13 times [2024-06-27 23:26:38,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:38,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427610690] [2024-06-27 23:26:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:38,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:40,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:40,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427610690] [2024-06-27 23:26:40,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427610690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:40,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:40,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:26:40,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894530838] [2024-06-27 23:26:40,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:40,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:26:40,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:40,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:26:40,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:26:40,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:26:40,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 386 transitions, 5864 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:40,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:40,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:26:40,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:42,619 INFO L124 PetriNetUnfolderBase]: 3685/5933 cut-off events. [2024-06-27 23:26:42,619 INFO L125 PetriNetUnfolderBase]: For 685209/685227 co-relation queries the response was YES. [2024-06-27 23:26:42,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55370 conditions, 5933 events. 3685/5933 cut-off events. For 685209/685227 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 37029 event pairs, 778 based on Foata normal form. 12/5926 useless extension candidates. Maximal degree in co-relation 55242. Up to 5197 conditions per place. [2024-06-27 23:26:42,694 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 315 selfloop transitions, 100 changer transitions 0/427 dead transitions. [2024-06-27 23:26:42,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 427 transitions, 7330 flow [2024-06-27 23:26:42,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:26:42,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:26:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:26:42,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47804878048780486 [2024-06-27 23:26:42,696 INFO L175 Difference]: Start difference. First operand has 268 places, 386 transitions, 5864 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:26:42,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 427 transitions, 7330 flow [2024-06-27 23:26:44,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 427 transitions, 6995 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 23:26:44,201 INFO L231 Difference]: Finished difference. Result has 272 places, 388 transitions, 5913 flow [2024-06-27 23:26:44,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5533, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5913, PETRI_PLACES=272, PETRI_TRANSITIONS=388} [2024-06-27 23:26:44,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-27 23:26:44,201 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 388 transitions, 5913 flow [2024-06-27 23:26:44,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:44,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:44,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:44,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 23:26:44,202 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:44,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:44,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1018309132, now seen corresponding path program 14 times [2024-06-27 23:26:44,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:44,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383992669] [2024-06-27 23:26:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:44,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:46,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:46,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383992669] [2024-06-27 23:26:46,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383992669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:46,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:46,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:26:46,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333705449] [2024-06-27 23:26:46,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:46,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:26:46,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:26:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:26:46,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:26:46,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 388 transitions, 5913 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:46,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:46,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:26:46,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:48,132 INFO L124 PetriNetUnfolderBase]: 3657/5889 cut-off events. [2024-06-27 23:26:48,132 INFO L125 PetriNetUnfolderBase]: For 663420/663438 co-relation queries the response was YES. [2024-06-27 23:26:48,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53669 conditions, 5889 events. 3657/5889 cut-off events. For 663420/663438 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 36754 event pairs, 738 based on Foata normal form. 16/5886 useless extension candidates. Maximal degree in co-relation 53539. Up to 5276 conditions per place. [2024-06-27 23:26:48,204 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 312 selfloop transitions, 98 changer transitions 0/422 dead transitions. [2024-06-27 23:26:48,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 422 transitions, 6891 flow [2024-06-27 23:26:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:26:48,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:26:48,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-27 23:26:48,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-27 23:26:48,206 INFO L175 Difference]: Start difference. First operand has 272 places, 388 transitions, 5913 flow. Second operand 11 states and 201 transitions. [2024-06-27 23:26:48,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 422 transitions, 6891 flow [2024-06-27 23:26:49,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 422 transitions, 6665 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-27 23:26:49,588 INFO L231 Difference]: Finished difference. Result has 277 places, 388 transitions, 5890 flow [2024-06-27 23:26:49,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5687, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5890, PETRI_PLACES=277, PETRI_TRANSITIONS=388} [2024-06-27 23:26:49,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-27 23:26:49,589 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 388 transitions, 5890 flow [2024-06-27 23:26:49,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:49,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:49,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:49,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 23:26:49,589 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:49,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:49,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1194187810, now seen corresponding path program 2 times [2024-06-27 23:26:49,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:49,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020249760] [2024-06-27 23:26:49,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:49,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:50,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:50,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020249760] [2024-06-27 23:26:50,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020249760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:50,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:50,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:26:50,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815162504] [2024-06-27 23:26:50,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:50,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:26:50,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:50,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:26:50,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:26:51,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:26:51,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 388 transitions, 5890 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:51,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:51,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:26:51,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:52,591 INFO L124 PetriNetUnfolderBase]: 3766/6005 cut-off events. [2024-06-27 23:26:52,592 INFO L125 PetriNetUnfolderBase]: For 627221/627221 co-relation queries the response was YES. [2024-06-27 23:26:52,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54244 conditions, 6005 events. 3766/6005 cut-off events. For 627221/627221 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 36934 event pairs, 815 based on Foata normal form. 2/5993 useless extension candidates. Maximal degree in co-relation 54112. Up to 5692 conditions per place. [2024-06-27 23:26:52,671 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 344 selfloop transitions, 57 changer transitions 0/405 dead transitions. [2024-06-27 23:26:52,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 405 transitions, 7128 flow [2024-06-27 23:26:52,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:26:52,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:26:52,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 23:26:52,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 23:26:52,672 INFO L175 Difference]: Start difference. First operand has 277 places, 388 transitions, 5890 flow. Second operand 7 states and 126 transitions. [2024-06-27 23:26:52,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 405 transitions, 7128 flow [2024-06-27 23:26:54,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 405 transitions, 6927 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-27 23:26:54,130 INFO L231 Difference]: Finished difference. Result has 274 places, 391 transitions, 5859 flow [2024-06-27 23:26:54,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5689, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5859, PETRI_PLACES=274, PETRI_TRANSITIONS=391} [2024-06-27 23:26:54,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-27 23:26:54,131 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 391 transitions, 5859 flow [2024-06-27 23:26:54,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:54,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:54,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:54,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 23:26:54,132 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:54,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:54,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1194603520, now seen corresponding path program 3 times [2024-06-27 23:26:54,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:54,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688710041] [2024-06-27 23:26:54,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:54,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:26:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:26:55,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:26:55,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688710041] [2024-06-27 23:26:55,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688710041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:26:55,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:26:55,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:26:55,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562677716] [2024-06-27 23:26:55,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:26:55,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:26:55,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:26:55,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:26:55,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:26:55,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:26:55,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 391 transitions, 5859 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:55,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:26:55,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:26:55,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:26:57,276 INFO L124 PetriNetUnfolderBase]: 3760/5997 cut-off events. [2024-06-27 23:26:57,276 INFO L125 PetriNetUnfolderBase]: For 635507/635507 co-relation queries the response was YES. [2024-06-27 23:26:57,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54061 conditions, 5997 events. 3760/5997 cut-off events. For 635507/635507 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 36957 event pairs, 811 based on Foata normal form. 2/5985 useless extension candidates. Maximal degree in co-relation 53927. Up to 5687 conditions per place. [2024-06-27 23:26:57,354 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 340 selfloop transitions, 60 changer transitions 0/404 dead transitions. [2024-06-27 23:26:57,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 404 transitions, 6901 flow [2024-06-27 23:26:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:26:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:26:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 23:26:57,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-27 23:26:57,355 INFO L175 Difference]: Start difference. First operand has 274 places, 391 transitions, 5859 flow. Second operand 7 states and 124 transitions. [2024-06-27 23:26:57,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 404 transitions, 6901 flow [2024-06-27 23:26:58,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 404 transitions, 6757 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 23:26:58,628 INFO L231 Difference]: Finished difference. Result has 278 places, 391 transitions, 5843 flow [2024-06-27 23:26:58,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5715, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5843, PETRI_PLACES=278, PETRI_TRANSITIONS=391} [2024-06-27 23:26:58,628 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-27 23:26:58,628 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 391 transitions, 5843 flow [2024-06-27 23:26:58,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:26:58,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:26:58,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:26:58,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 23:26:58,629 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:26:58,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:26:58,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1838205260, now seen corresponding path program 15 times [2024-06-27 23:26:58,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:26:58,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740810396] [2024-06-27 23:26:58,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:26:58,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:26:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:00,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:00,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740810396] [2024-06-27 23:27:00,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740810396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:00,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:00,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:27:00,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739025164] [2024-06-27 23:27:00,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:00,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:27:00,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:00,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:27:00,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:27:00,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:27:00,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 391 transitions, 5843 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:00,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:00,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:27:00,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:02,587 INFO L124 PetriNetUnfolderBase]: 3757/6063 cut-off events. [2024-06-27 23:27:02,587 INFO L125 PetriNetUnfolderBase]: For 697064/697068 co-relation queries the response was YES. [2024-06-27 23:27:02,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55177 conditions, 6063 events. 3757/6063 cut-off events. For 697064/697068 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 38244 event pairs, 789 based on Foata normal form. 16/6072 useless extension candidates. Maximal degree in co-relation 55040. Up to 5428 conditions per place. [2024-06-27 23:27:02,658 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 315 selfloop transitions, 106 changer transitions 0/433 dead transitions. [2024-06-27 23:27:02,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 433 transitions, 6986 flow [2024-06-27 23:27:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:27:02,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:27:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 23:27:02,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611973392461197 [2024-06-27 23:27:02,659 INFO L175 Difference]: Start difference. First operand has 278 places, 391 transitions, 5843 flow. Second operand 11 states and 208 transitions. [2024-06-27 23:27:02,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 433 transitions, 6986 flow [2024-06-27 23:27:04,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 433 transitions, 6894 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 23:27:04,029 INFO L231 Difference]: Finished difference. Result has 286 places, 393 transitions, 6102 flow [2024-06-27 23:27:04,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5751, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6102, PETRI_PLACES=286, PETRI_TRANSITIONS=393} [2024-06-27 23:27:04,030 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-27 23:27:04,030 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 393 transitions, 6102 flow [2024-06-27 23:27:04,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:04,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:04,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:04,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 23:27:04,030 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:04,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:04,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1409531006, now seen corresponding path program 16 times [2024-06-27 23:27:04,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:04,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036864003] [2024-06-27 23:27:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:04,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:06,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:06,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036864003] [2024-06-27 23:27:06,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036864003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:06,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:06,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:27:06,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257084361] [2024-06-27 23:27:06,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:06,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:27:06,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:06,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:27:06,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:27:06,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:27:06,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 393 transitions, 6102 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:06,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:06,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:27:06,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:08,096 INFO L124 PetriNetUnfolderBase]: 3901/6309 cut-off events. [2024-06-27 23:27:08,097 INFO L125 PetriNetUnfolderBase]: For 720542/720546 co-relation queries the response was YES. [2024-06-27 23:27:08,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57917 conditions, 6309 events. 3901/6309 cut-off events. For 720542/720546 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 40156 event pairs, 796 based on Foata normal form. 12/6314 useless extension candidates. Maximal degree in co-relation 57778. Up to 5054 conditions per place. [2024-06-27 23:27:08,181 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 289 selfloop transitions, 141 changer transitions 0/442 dead transitions. [2024-06-27 23:27:08,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 442 transitions, 7647 flow [2024-06-27 23:27:08,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:27:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:27:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-27 23:27:08,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700665188470067 [2024-06-27 23:27:08,182 INFO L175 Difference]: Start difference. First operand has 286 places, 393 transitions, 6102 flow. Second operand 11 states and 212 transitions. [2024-06-27 23:27:08,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 442 transitions, 7647 flow [2024-06-27 23:27:09,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 442 transitions, 7389 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-27 23:27:09,652 INFO L231 Difference]: Finished difference. Result has 289 places, 397 transitions, 6366 flow [2024-06-27 23:27:09,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5844, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6366, PETRI_PLACES=289, PETRI_TRANSITIONS=397} [2024-06-27 23:27:09,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-27 23:27:09,653 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 397 transitions, 6366 flow [2024-06-27 23:27:09,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:09,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:09,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:09,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 23:27:09,654 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:09,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:09,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1409321756, now seen corresponding path program 17 times [2024-06-27 23:27:09,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:09,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106360584] [2024-06-27 23:27:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:09,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:11,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:11,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106360584] [2024-06-27 23:27:11,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106360584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:11,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:11,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:27:11,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430565894] [2024-06-27 23:27:11,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:11,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:27:11,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:11,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:27:11,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:27:12,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:27:12,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 397 transitions, 6366 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:12,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:12,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:27:12,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:13,825 INFO L124 PetriNetUnfolderBase]: 3959/6407 cut-off events. [2024-06-27 23:27:13,825 INFO L125 PetriNetUnfolderBase]: For 753861/753865 co-relation queries the response was YES. [2024-06-27 23:27:13,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59338 conditions, 6407 events. 3959/6407 cut-off events. For 753861/753865 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 41071 event pairs, 833 based on Foata normal form. 16/6416 useless extension candidates. Maximal degree in co-relation 59197. Up to 5771 conditions per place. [2024-06-27 23:27:13,903 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 325 selfloop transitions, 101 changer transitions 0/438 dead transitions. [2024-06-27 23:27:13,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 438 transitions, 7487 flow [2024-06-27 23:27:13,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:27:13,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:27:13,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-27 23:27:13,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458980044345898 [2024-06-27 23:27:13,905 INFO L175 Difference]: Start difference. First operand has 289 places, 397 transitions, 6366 flow. Second operand 11 states and 207 transitions. [2024-06-27 23:27:13,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 438 transitions, 7487 flow [2024-06-27 23:27:15,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 438 transitions, 6774 flow, removed 38 selfloop flow, removed 12 redundant places. [2024-06-27 23:27:15,528 INFO L231 Difference]: Finished difference. Result has 288 places, 398 transitions, 5960 flow [2024-06-27 23:27:15,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5661, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5960, PETRI_PLACES=288, PETRI_TRANSITIONS=398} [2024-06-27 23:27:15,529 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-27 23:27:15,529 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 398 transitions, 5960 flow [2024-06-27 23:27:15,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:15,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:15,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:15,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 23:27:15,529 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:15,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:15,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1403959376, now seen corresponding path program 18 times [2024-06-27 23:27:15,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:15,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297609778] [2024-06-27 23:27:15,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:15,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:17,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:17,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297609778] [2024-06-27 23:27:17,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297609778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:17,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:17,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:27:17,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928788286] [2024-06-27 23:27:17,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:17,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:27:17,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:17,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:27:17,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:27:17,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:27:17,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 398 transitions, 5960 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:17,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:17,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:27:17,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:19,599 INFO L124 PetriNetUnfolderBase]: 3931/6363 cut-off events. [2024-06-27 23:27:19,600 INFO L125 PetriNetUnfolderBase]: For 712419/712423 co-relation queries the response was YES. [2024-06-27 23:27:19,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55990 conditions, 6363 events. 3931/6363 cut-off events. For 712419/712423 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 40807 event pairs, 817 based on Foata normal form. 16/6372 useless extension candidates. Maximal degree in co-relation 55851. Up to 5727 conditions per place. [2024-06-27 23:27:19,682 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 330 selfloop transitions, 96 changer transitions 0/438 dead transitions. [2024-06-27 23:27:19,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 438 transitions, 6988 flow [2024-06-27 23:27:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:27:19,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:27:19,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 23:27:19,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611973392461197 [2024-06-27 23:27:19,684 INFO L175 Difference]: Start difference. First operand has 288 places, 398 transitions, 5960 flow. Second operand 11 states and 208 transitions. [2024-06-27 23:27:19,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 438 transitions, 6988 flow [2024-06-27 23:27:20,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 438 transitions, 6706 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-27 23:27:20,892 INFO L231 Difference]: Finished difference. Result has 290 places, 398 transitions, 5880 flow [2024-06-27 23:27:20,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5678, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5880, PETRI_PLACES=290, PETRI_TRANSITIONS=398} [2024-06-27 23:27:20,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-27 23:27:20,893 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 398 transitions, 5880 flow [2024-06-27 23:27:20,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:20,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:20,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:20,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 23:27:20,893 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:20,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:20,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1659362846, now seen corresponding path program 4 times [2024-06-27 23:27:20,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:20,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897675419] [2024-06-27 23:27:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:20,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:22,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:22,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897675419] [2024-06-27 23:27:22,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897675419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:22,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:22,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:27:22,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935300909] [2024-06-27 23:27:22,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:22,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:27:22,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:22,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:27:22,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:27:22,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:27:22,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 398 transitions, 5880 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:22,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:22,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:27:22,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:23,785 INFO L124 PetriNetUnfolderBase]: 4034/6470 cut-off events. [2024-06-27 23:27:23,785 INFO L125 PetriNetUnfolderBase]: For 667625/667625 co-relation queries the response was YES. [2024-06-27 23:27:23,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56138 conditions, 6470 events. 4034/6470 cut-off events. For 667625/667625 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 41028 event pairs, 854 based on Foata normal form. 2/6469 useless extension candidates. Maximal degree in co-relation 55998. Up to 6146 conditions per place. [2024-06-27 23:27:23,859 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 357 selfloop transitions, 62 changer transitions 0/423 dead transitions. [2024-06-27 23:27:23,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 423 transitions, 6876 flow [2024-06-27 23:27:23,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:27:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:27:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 23:27:23,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 23:27:23,860 INFO L175 Difference]: Start difference. First operand has 290 places, 398 transitions, 5880 flow. Second operand 8 states and 144 transitions. [2024-06-27 23:27:23,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 423 transitions, 6876 flow [2024-06-27 23:27:25,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 423 transitions, 6606 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-27 23:27:25,029 INFO L231 Difference]: Finished difference. Result has 288 places, 402 transitions, 5780 flow [2024-06-27 23:27:25,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5614, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5780, PETRI_PLACES=288, PETRI_TRANSITIONS=402} [2024-06-27 23:27:25,030 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-27 23:27:25,030 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 402 transitions, 5780 flow [2024-06-27 23:27:25,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:25,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:25,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:25,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 23:27:25,030 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:25,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:25,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1017120646, now seen corresponding path program 1 times [2024-06-27 23:27:25,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:25,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150949357] [2024-06-27 23:27:25,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:25,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:26,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:26,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150949357] [2024-06-27 23:27:26,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150949357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:26,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:26,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:27:26,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842147042] [2024-06-27 23:27:26,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:26,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:27:26,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:26,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:27:26,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:27:26,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:27:26,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 402 transitions, 5780 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:26,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:26,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:27:26,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:27,788 INFO L124 PetriNetUnfolderBase]: 3897/6338 cut-off events. [2024-06-27 23:27:27,788 INFO L125 PetriNetUnfolderBase]: For 586842/586842 co-relation queries the response was YES. [2024-06-27 23:27:27,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52999 conditions, 6338 events. 3897/6338 cut-off events. For 586842/586842 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 41034 event pairs, 1294 based on Foata normal form. 1/6329 useless extension candidates. Maximal degree in co-relation 52858. Up to 6047 conditions per place. [2024-06-27 23:27:27,865 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 393 selfloop transitions, 16 changer transitions 0/420 dead transitions. [2024-06-27 23:27:27,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 420 transitions, 6704 flow [2024-06-27 23:27:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:27:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:27:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 23:27:27,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 23:27:27,866 INFO L175 Difference]: Start difference. First operand has 288 places, 402 transitions, 5780 flow. Second operand 7 states and 126 transitions. [2024-06-27 23:27:27,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 420 transitions, 6704 flow [2024-06-27 23:27:29,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 420 transitions, 6616 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 23:27:29,155 INFO L231 Difference]: Finished difference. Result has 291 places, 405 transitions, 5792 flow [2024-06-27 23:27:29,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5692, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5792, PETRI_PLACES=291, PETRI_TRANSITIONS=405} [2024-06-27 23:27:29,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-27 23:27:29,155 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 405 transitions, 5792 flow [2024-06-27 23:27:29,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:29,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:29,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:29,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 23:27:29,155 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:29,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:29,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2031856308, now seen corresponding path program 1 times [2024-06-27 23:27:29,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:29,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294203477] [2024-06-27 23:27:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:29,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:30,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:30,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294203477] [2024-06-27 23:27:30,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294203477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:30,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:30,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:27:30,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410525433] [2024-06-27 23:27:30,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:30,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:27:30,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:30,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:27:30,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:27:30,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:27:30,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 405 transitions, 5792 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:30,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:30,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:27:30,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:31,771 INFO L124 PetriNetUnfolderBase]: 3902/6347 cut-off events. [2024-06-27 23:27:31,771 INFO L125 PetriNetUnfolderBase]: For 597641/597641 co-relation queries the response was YES. [2024-06-27 23:27:31,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53301 conditions, 6347 events. 3902/6347 cut-off events. For 597641/597641 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 41175 event pairs, 1295 based on Foata normal form. 1/6338 useless extension candidates. Maximal degree in co-relation 53158. Up to 6043 conditions per place. [2024-06-27 23:27:31,851 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 389 selfloop transitions, 27 changer transitions 0/427 dead transitions. [2024-06-27 23:27:31,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 427 transitions, 6908 flow [2024-06-27 23:27:31,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:27:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:27:31,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 23:27:31,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 23:27:31,853 INFO L175 Difference]: Start difference. First operand has 291 places, 405 transitions, 5792 flow. Second operand 8 states and 138 transitions. [2024-06-27 23:27:31,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 427 transitions, 6908 flow [2024-06-27 23:27:33,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 427 transitions, 6830 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 23:27:33,424 INFO L231 Difference]: Finished difference. Result has 295 places, 414 transitions, 5876 flow [2024-06-27 23:27:33,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5714, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5876, PETRI_PLACES=295, PETRI_TRANSITIONS=414} [2024-06-27 23:27:33,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-27 23:27:33,424 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 414 transitions, 5876 flow [2024-06-27 23:27:33,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:33,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:33,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:33,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 23:27:33,425 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:33,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:33,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1400207996, now seen corresponding path program 2 times [2024-06-27 23:27:33,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:33,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223200507] [2024-06-27 23:27:33,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:33,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:34,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:34,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223200507] [2024-06-27 23:27:34,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223200507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:34,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:34,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:27:34,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035121504] [2024-06-27 23:27:34,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:34,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:27:34,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:34,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:27:34,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:27:34,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:27:34,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 414 transitions, 5876 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:34,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:34,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:27:34,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:36,137 INFO L124 PetriNetUnfolderBase]: 3907/6354 cut-off events. [2024-06-27 23:27:36,137 INFO L125 PetriNetUnfolderBase]: For 611356/611356 co-relation queries the response was YES. [2024-06-27 23:27:36,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53933 conditions, 6354 events. 3907/6354 cut-off events. For 611356/611356 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 41165 event pairs, 1294 based on Foata normal form. 1/6345 useless extension candidates. Maximal degree in co-relation 53788. Up to 6045 conditions per place. [2024-06-27 23:27:36,224 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 394 selfloop transitions, 28 changer transitions 0/433 dead transitions. [2024-06-27 23:27:36,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 433 transitions, 7052 flow [2024-06-27 23:27:36,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:27:36,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:27:36,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 23:27:36,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 23:27:36,225 INFO L175 Difference]: Start difference. First operand has 295 places, 414 transitions, 5876 flow. Second operand 8 states and 138 transitions. [2024-06-27 23:27:36,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 433 transitions, 7052 flow [2024-06-27 23:27:37,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 433 transitions, 7015 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 23:27:37,497 INFO L231 Difference]: Finished difference. Result has 300 places, 420 transitions, 6035 flow [2024-06-27 23:27:37,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5839, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6035, PETRI_PLACES=300, PETRI_TRANSITIONS=420} [2024-06-27 23:27:37,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-27 23:27:37,497 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 420 transitions, 6035 flow [2024-06-27 23:27:37,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:37,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:37,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:37,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 23:27:37,498 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:37,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:37,498 INFO L85 PathProgramCache]: Analyzing trace with hash -107694740, now seen corresponding path program 2 times [2024-06-27 23:27:37,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:37,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182390185] [2024-06-27 23:27:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:37,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:38,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:38,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182390185] [2024-06-27 23:27:38,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182390185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:38,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:38,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:27:38,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635166379] [2024-06-27 23:27:38,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:38,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:27:38,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:38,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:27:38,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:27:38,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:27:38,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 420 transitions, 6035 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:38,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:38,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:27:38,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:40,014 INFO L124 PetriNetUnfolderBase]: 3912/6363 cut-off events. [2024-06-27 23:27:40,014 INFO L125 PetriNetUnfolderBase]: For 625397/625397 co-relation queries the response was YES. [2024-06-27 23:27:40,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54396 conditions, 6363 events. 3912/6363 cut-off events. For 625397/625397 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41260 event pairs, 1293 based on Foata normal form. 1/6354 useless extension candidates. Maximal degree in co-relation 54249. Up to 6078 conditions per place. [2024-06-27 23:27:40,097 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 403 selfloop transitions, 18 changer transitions 0/432 dead transitions. [2024-06-27 23:27:40,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 432 transitions, 6935 flow [2024-06-27 23:27:40,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:27:40,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:27:40,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 23:27:40,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-27 23:27:40,098 INFO L175 Difference]: Start difference. First operand has 300 places, 420 transitions, 6035 flow. Second operand 7 states and 120 transitions. [2024-06-27 23:27:40,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 432 transitions, 6935 flow [2024-06-27 23:27:42,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 432 transitions, 6856 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 23:27:42,111 INFO L231 Difference]: Finished difference. Result has 303 places, 423 transitions, 6037 flow [2024-06-27 23:27:42,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5956, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6037, PETRI_PLACES=303, PETRI_TRANSITIONS=423} [2024-06-27 23:27:42,111 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-27 23:27:42,111 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 423 transitions, 6037 flow [2024-06-27 23:27:42,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:42,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:42,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:42,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 23:27:42,112 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:42,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:42,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1194372322, now seen corresponding path program 3 times [2024-06-27 23:27:42,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:42,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616083053] [2024-06-27 23:27:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:42,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:43,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:43,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616083053] [2024-06-27 23:27:43,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616083053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:43,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:43,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:27:43,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516492533] [2024-06-27 23:27:43,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:43,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:27:43,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:43,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:27:43,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:27:43,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:27:43,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 423 transitions, 6037 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:43,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:43,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:27:43,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:44,713 INFO L124 PetriNetUnfolderBase]: 3909/6359 cut-off events. [2024-06-27 23:27:44,713 INFO L125 PetriNetUnfolderBase]: For 633971/633971 co-relation queries the response was YES. [2024-06-27 23:27:44,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54427 conditions, 6359 events. 3909/6359 cut-off events. For 633971/633971 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 41212 event pairs, 1293 based on Foata normal form. 1/6350 useless extension candidates. Maximal degree in co-relation 54278. Up to 6068 conditions per place. [2024-06-27 23:27:44,800 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 398 selfloop transitions, 23 changer transitions 0/432 dead transitions. [2024-06-27 23:27:44,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 432 transitions, 6905 flow [2024-06-27 23:27:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:27:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:27:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 23:27:44,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-27 23:27:44,802 INFO L175 Difference]: Start difference. First operand has 303 places, 423 transitions, 6037 flow. Second operand 7 states and 122 transitions. [2024-06-27 23:27:44,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 432 transitions, 6905 flow [2024-06-27 23:27:46,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 432 transitions, 6850 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 23:27:46,834 INFO L231 Difference]: Finished difference. Result has 306 places, 423 transitions, 6034 flow [2024-06-27 23:27:46,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5982, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6034, PETRI_PLACES=306, PETRI_TRANSITIONS=423} [2024-06-27 23:27:46,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-27 23:27:46,835 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 423 transitions, 6034 flow [2024-06-27 23:27:46,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:46,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:46,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:46,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 23:27:46,835 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:46,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:46,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1021882246, now seen corresponding path program 3 times [2024-06-27 23:27:46,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:46,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485196424] [2024-06-27 23:27:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:46,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:47,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:47,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485196424] [2024-06-27 23:27:47,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485196424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:47,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:47,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:27:47,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554704837] [2024-06-27 23:27:47,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:47,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:27:47,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:47,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:27:47,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:27:48,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:27:48,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 423 transitions, 6034 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:48,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:48,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:27:48,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:49,536 INFO L124 PetriNetUnfolderBase]: 3906/6355 cut-off events. [2024-06-27 23:27:49,536 INFO L125 PetriNetUnfolderBase]: For 642632/642632 co-relation queries the response was YES. [2024-06-27 23:27:49,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54444 conditions, 6355 events. 3906/6355 cut-off events. For 642632/642632 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 41279 event pairs, 1293 based on Foata normal form. 1/6346 useless extension candidates. Maximal degree in co-relation 54293. Up to 6072 conditions per place. [2024-06-27 23:27:49,614 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 405 selfloop transitions, 16 changer transitions 0/432 dead transitions. [2024-06-27 23:27:49,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 432 transitions, 6902 flow [2024-06-27 23:27:49,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:27:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:27:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 23:27:49,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-27 23:27:49,615 INFO L175 Difference]: Start difference. First operand has 306 places, 423 transitions, 6034 flow. Second operand 7 states and 120 transitions. [2024-06-27 23:27:49,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 432 transitions, 6902 flow [2024-06-27 23:27:51,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 432 transitions, 6789 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 23:27:51,534 INFO L231 Difference]: Finished difference. Result has 307 places, 423 transitions, 5959 flow [2024-06-27 23:27:51,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5921, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5959, PETRI_PLACES=307, PETRI_TRANSITIONS=423} [2024-06-27 23:27:51,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-27 23:27:51,535 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 423 transitions, 5959 flow [2024-06-27 23:27:51,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:51,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:51,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:51,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 23:27:51,535 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:51,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:51,536 INFO L85 PathProgramCache]: Analyzing trace with hash -59188715, now seen corresponding path program 1 times [2024-06-27 23:27:51,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:51,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123671693] [2024-06-27 23:27:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:51,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:27:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:27:53,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:27:53,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123671693] [2024-06-27 23:27:53,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123671693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:27:53,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:27:53,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:27:53,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572431932] [2024-06-27 23:27:53,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:27:53,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:27:53,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:27:53,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:27:53,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:27:53,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:27:53,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 423 transitions, 5959 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:53,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:27:53,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:27:53,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:27:55,518 INFO L124 PetriNetUnfolderBase]: 4067/6566 cut-off events. [2024-06-27 23:27:55,518 INFO L125 PetriNetUnfolderBase]: For 823582/823588 co-relation queries the response was YES. [2024-06-27 23:27:55,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58694 conditions, 6566 events. 4067/6566 cut-off events. For 823582/823588 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 42266 event pairs, 751 based on Foata normal form. 12/6542 useless extension candidates. Maximal degree in co-relation 58542. Up to 5985 conditions per place. [2024-06-27 23:27:55,605 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 387 selfloop transitions, 64 changer transitions 0/466 dead transitions. [2024-06-27 23:27:55,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 466 transitions, 7135 flow [2024-06-27 23:27:55,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:27:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:27:55,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-27 23:27:55,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2024-06-27 23:27:55,607 INFO L175 Difference]: Start difference. First operand has 307 places, 423 transitions, 5959 flow. Second operand 11 states and 200 transitions. [2024-06-27 23:27:55,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 466 transitions, 7135 flow [2024-06-27 23:27:58,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 466 transitions, 7081 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 23:27:58,129 INFO L231 Difference]: Finished difference. Result has 313 places, 431 transitions, 6200 flow [2024-06-27 23:27:58,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5905, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6200, PETRI_PLACES=313, PETRI_TRANSITIONS=431} [2024-06-27 23:27:58,130 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-27 23:27:58,130 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 431 transitions, 6200 flow [2024-06-27 23:27:58,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:27:58,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:27:58,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:27:58,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 23:27:58,130 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:27:58,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:27:58,131 INFO L85 PathProgramCache]: Analyzing trace with hash -54604745, now seen corresponding path program 2 times [2024-06-27 23:27:58,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:27:58,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401991711] [2024-06-27 23:27:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:27:58,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:27:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:28:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:28:00,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:28:00,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401991711] [2024-06-27 23:28:00,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401991711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:28:00,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:28:00,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:28:00,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749013399] [2024-06-27 23:28:00,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:28:00,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:28:00,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:28:00,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:28:00,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:28:00,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:28:00,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 431 transitions, 6200 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:00,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:28:00,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:28:00,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:28:02,210 INFO L124 PetriNetUnfolderBase]: 4093/6624 cut-off events. [2024-06-27 23:28:02,210 INFO L125 PetriNetUnfolderBase]: For 834211/834215 co-relation queries the response was YES. [2024-06-27 23:28:02,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59722 conditions, 6624 events. 4093/6624 cut-off events. For 834211/834215 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 42720 event pairs, 836 based on Foata normal form. 12/6615 useless extension candidates. Maximal degree in co-relation 59568. Up to 6118 conditions per place. [2024-06-27 23:28:02,298 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 394 selfloop transitions, 60 changer transitions 0/469 dead transitions. [2024-06-27 23:28:02,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 469 transitions, 7355 flow [2024-06-27 23:28:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:28:02,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:28:02,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-27 23:28:02,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 23:28:02,299 INFO L175 Difference]: Start difference. First operand has 313 places, 431 transitions, 6200 flow. Second operand 11 states and 198 transitions. [2024-06-27 23:28:02,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 469 transitions, 7355 flow [2024-06-27 23:28:05,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 469 transitions, 7170 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 23:28:05,030 INFO L231 Difference]: Finished difference. Result has 318 places, 435 transitions, 6277 flow [2024-06-27 23:28:05,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6021, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6277, PETRI_PLACES=318, PETRI_TRANSITIONS=435} [2024-06-27 23:28:05,030 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-27 23:28:05,031 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 435 transitions, 6277 flow [2024-06-27 23:28:05,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:05,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:28:05,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:28:05,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 23:28:05,031 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:28:05,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:28:05,031 INFO L85 PathProgramCache]: Analyzing trace with hash -172692425, now seen corresponding path program 3 times [2024-06-27 23:28:05,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:28:05,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335864961] [2024-06-27 23:28:05,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:28:05,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:28:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:28:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:28:07,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:28:07,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335864961] [2024-06-27 23:28:07,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335864961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:28:07,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:28:07,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:28:07,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460022125] [2024-06-27 23:28:07,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:28:07,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:28:07,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:28:07,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:28:07,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:28:07,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:28:07,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 435 transitions, 6277 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:07,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:28:07,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:28:07,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:28:09,223 INFO L124 PetriNetUnfolderBase]: 4130/6685 cut-off events. [2024-06-27 23:28:09,223 INFO L125 PetriNetUnfolderBase]: For 838837/838841 co-relation queries the response was YES. [2024-06-27 23:28:09,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60159 conditions, 6685 events. 4130/6685 cut-off events. For 838837/838841 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 43220 event pairs, 811 based on Foata normal form. 12/6676 useless extension candidates. Maximal degree in co-relation 60003. Up to 6080 conditions per place. [2024-06-27 23:28:09,303 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 406 selfloop transitions, 57 changer transitions 0/478 dead transitions. [2024-06-27 23:28:09,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 478 transitions, 7474 flow [2024-06-27 23:28:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:28:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:28:09,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-27 23:28:09,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44124168514412415 [2024-06-27 23:28:09,304 INFO L175 Difference]: Start difference. First operand has 318 places, 435 transitions, 6277 flow. Second operand 11 states and 199 transitions. [2024-06-27 23:28:09,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 478 transitions, 7474 flow [2024-06-27 23:28:11,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 478 transitions, 7296 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-27 23:28:11,731 INFO L231 Difference]: Finished difference. Result has 321 places, 441 transitions, 6367 flow [2024-06-27 23:28:11,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6099, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6367, PETRI_PLACES=321, PETRI_TRANSITIONS=441} [2024-06-27 23:28:11,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-27 23:28:11,731 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 441 transitions, 6367 flow [2024-06-27 23:28:11,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:11,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:28:11,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:28:11,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 23:28:11,731 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:28:11,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:28:11,732 INFO L85 PathProgramCache]: Analyzing trace with hash -762706291, now seen corresponding path program 4 times [2024-06-27 23:28:11,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:28:11,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031681718] [2024-06-27 23:28:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:28:11,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:28:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:28:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:28:13,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:28:13,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031681718] [2024-06-27 23:28:13,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031681718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:28:13,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:28:13,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:28:13,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483087934] [2024-06-27 23:28:13,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:28:13,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:28:13,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:28:13,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:28:13,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:28:14,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:28:14,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 441 transitions, 6367 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:14,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:28:14,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:28:14,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:28:16,000 INFO L124 PetriNetUnfolderBase]: 4199/6801 cut-off events. [2024-06-27 23:28:16,000 INFO L125 PetriNetUnfolderBase]: For 870086/870090 co-relation queries the response was YES. [2024-06-27 23:28:16,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61263 conditions, 6801 events. 4199/6801 cut-off events. For 870086/870090 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 44083 event pairs, 834 based on Foata normal form. 12/6800 useless extension candidates. Maximal degree in co-relation 61105. Up to 6244 conditions per place. [2024-06-27 23:28:16,101 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 381 selfloop transitions, 84 changer transitions 0/480 dead transitions. [2024-06-27 23:28:16,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 480 transitions, 7541 flow [2024-06-27 23:28:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:28:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:28:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-27 23:28:16,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2024-06-27 23:28:16,103 INFO L175 Difference]: Start difference. First operand has 321 places, 441 transitions, 6367 flow. Second operand 11 states and 200 transitions. [2024-06-27 23:28:16,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 480 transitions, 7541 flow [2024-06-27 23:28:17,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 480 transitions, 7360 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-27 23:28:17,971 INFO L231 Difference]: Finished difference. Result has 325 places, 446 transitions, 6489 flow [2024-06-27 23:28:17,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6186, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6489, PETRI_PLACES=325, PETRI_TRANSITIONS=446} [2024-06-27 23:28:17,971 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-27 23:28:17,971 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 446 transitions, 6489 flow [2024-06-27 23:28:17,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:17,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:28:17,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:28:17,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 23:28:17,972 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:28:17,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:28:17,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1061426447, now seen corresponding path program 5 times [2024-06-27 23:28:17,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:28:17,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445567873] [2024-06-27 23:28:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:28:17,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:28:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:28:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:28:20,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:28:20,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445567873] [2024-06-27 23:28:20,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445567873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:28:20,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:28:20,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:28:20,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421276296] [2024-06-27 23:28:20,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:28:20,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:28:20,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:28:20,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:28:20,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:28:20,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:28:20,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 446 transitions, 6489 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:20,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:28:20,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:28:20,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:28:22,515 INFO L124 PetriNetUnfolderBase]: 4268/6916 cut-off events. [2024-06-27 23:28:22,515 INFO L125 PetriNetUnfolderBase]: For 888995/888999 co-relation queries the response was YES. [2024-06-27 23:28:22,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62054 conditions, 6916 events. 4268/6916 cut-off events. For 888995/888999 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 44981 event pairs, 861 based on Foata normal form. 12/6915 useless extension candidates. Maximal degree in co-relation 61894. Up to 6359 conditions per place. [2024-06-27 23:28:22,622 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 389 selfloop transitions, 81 changer transitions 0/485 dead transitions. [2024-06-27 23:28:22,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 485 transitions, 7683 flow [2024-06-27 23:28:22,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:28:22,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:28:22,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-27 23:28:22,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-27 23:28:22,624 INFO L175 Difference]: Start difference. First operand has 325 places, 446 transitions, 6489 flow. Second operand 11 states and 201 transitions. [2024-06-27 23:28:22,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 485 transitions, 7683 flow [2024-06-27 23:28:25,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 485 transitions, 7460 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 23:28:25,595 INFO L231 Difference]: Finished difference. Result has 329 places, 451 transitions, 6573 flow [2024-06-27 23:28:25,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6266, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6573, PETRI_PLACES=329, PETRI_TRANSITIONS=451} [2024-06-27 23:28:25,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-27 23:28:25,596 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 451 transitions, 6573 flow [2024-06-27 23:28:25,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:25,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:28:25,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:28:25,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 23:28:25,597 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:28:25,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:28:25,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1056842477, now seen corresponding path program 6 times [2024-06-27 23:28:25,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:28:25,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488475969] [2024-06-27 23:28:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:28:25,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:28:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:28:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:28:27,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:28:27,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488475969] [2024-06-27 23:28:27,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488475969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:28:27,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:28:27,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:28:27,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661151175] [2024-06-27 23:28:27,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:28:27,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:28:27,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:28:27,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:28:27,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:28:28,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:28:28,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 451 transitions, 6573 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:28,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:28:28,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:28:28,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:28:30,381 INFO L124 PetriNetUnfolderBase]: 4309/6987 cut-off events. [2024-06-27 23:28:30,382 INFO L125 PetriNetUnfolderBase]: For 910319/910323 co-relation queries the response was YES. [2024-06-27 23:28:30,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62767 conditions, 6987 events. 4309/6987 cut-off events. For 910319/910323 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 45571 event pairs, 854 based on Foata normal form. 12/6986 useless extension candidates. Maximal degree in co-relation 62605. Up to 6338 conditions per place. [2024-06-27 23:28:30,469 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 385 selfloop transitions, 90 changer transitions 0/490 dead transitions. [2024-06-27 23:28:30,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 490 transitions, 7785 flow [2024-06-27 23:28:30,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:28:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:28:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-27 23:28:30,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44789356984478934 [2024-06-27 23:28:30,470 INFO L175 Difference]: Start difference. First operand has 329 places, 451 transitions, 6573 flow. Second operand 11 states and 202 transitions. [2024-06-27 23:28:30,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 490 transitions, 7785 flow [2024-06-27 23:28:33,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 490 transitions, 7558 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-27 23:28:33,219 INFO L231 Difference]: Finished difference. Result has 333 places, 455 transitions, 6682 flow [2024-06-27 23:28:33,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6346, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6682, PETRI_PLACES=333, PETRI_TRANSITIONS=455} [2024-06-27 23:28:33,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-27 23:28:33,220 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 455 transitions, 6682 flow [2024-06-27 23:28:33,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:33,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:28:33,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:28:33,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 23:28:33,221 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:28:33,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:28:33,221 INFO L85 PathProgramCache]: Analyzing trace with hash 262143573, now seen corresponding path program 1 times [2024-06-27 23:28:33,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:28:33,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060926669] [2024-06-27 23:28:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:28:33,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:28:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:28:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:28:34,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:28:34,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060926669] [2024-06-27 23:28:34,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060926669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:28:34,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:28:34,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:28:34,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541335611] [2024-06-27 23:28:34,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:28:34,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:28:34,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:28:34,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:28:34,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:28:34,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:28:34,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 455 transitions, 6682 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:34,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:28:34,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:28:34,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:28:36,128 INFO L124 PetriNetUnfolderBase]: 4409/7099 cut-off events. [2024-06-27 23:28:36,128 INFO L125 PetriNetUnfolderBase]: For 887803/887806 co-relation queries the response was YES. [2024-06-27 23:28:36,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63713 conditions, 7099 events. 4409/7099 cut-off events. For 887803/887806 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 45924 event pairs, 1036 based on Foata normal form. 3/7097 useless extension candidates. Maximal degree in co-relation 63549. Up to 6847 conditions per place. [2024-06-27 23:28:36,220 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 445 selfloop transitions, 38 changer transitions 0/487 dead transitions. [2024-06-27 23:28:36,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 487 transitions, 8126 flow [2024-06-27 23:28:36,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:28:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:28:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 23:28:36,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-27 23:28:36,221 INFO L175 Difference]: Start difference. First operand has 333 places, 455 transitions, 6682 flow. Second operand 7 states and 127 transitions. [2024-06-27 23:28:36,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 487 transitions, 8126 flow [2024-06-27 23:28:39,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 487 transitions, 7853 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-27 23:28:39,372 INFO L231 Difference]: Finished difference. Result has 334 places, 471 transitions, 6785 flow [2024-06-27 23:28:39,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6409, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6785, PETRI_PLACES=334, PETRI_TRANSITIONS=471} [2024-06-27 23:28:39,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-27 23:28:39,373 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 471 transitions, 6785 flow [2024-06-27 23:28:39,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:39,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:28:39,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:28:39,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 23:28:39,373 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:28:39,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:28:39,374 INFO L85 PathProgramCache]: Analyzing trace with hash 267857493, now seen corresponding path program 2 times [2024-06-27 23:28:39,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:28:39,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296848649] [2024-06-27 23:28:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:28:39,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:28:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:28:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:28:40,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:28:40,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296848649] [2024-06-27 23:28:40,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296848649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:28:40,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:28:40,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:28:40,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588251996] [2024-06-27 23:28:40,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:28:40,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:28:40,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:28:40,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:28:40,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:28:40,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:28:40,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 471 transitions, 6785 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:40,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:28:40,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:28:40,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:28:42,316 INFO L124 PetriNetUnfolderBase]: 4414/7106 cut-off events. [2024-06-27 23:28:42,317 INFO L125 PetriNetUnfolderBase]: For 895477/895480 co-relation queries the response was YES. [2024-06-27 23:28:42,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63640 conditions, 7106 events. 4414/7106 cut-off events. For 895477/895480 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 45969 event pairs, 1035 based on Foata normal form. 3/7104 useless extension candidates. Maximal degree in co-relation 63472. Up to 6876 conditions per place. [2024-06-27 23:28:42,410 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 451 selfloop transitions, 32 changer transitions 0/487 dead transitions. [2024-06-27 23:28:42,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 487 transitions, 7870 flow [2024-06-27 23:28:42,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:28:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:28:42,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 23:28:42,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-27 23:28:42,411 INFO L175 Difference]: Start difference. First operand has 334 places, 471 transitions, 6785 flow. Second operand 7 states and 122 transitions. [2024-06-27 23:28:42,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 487 transitions, 7870 flow [2024-06-27 23:28:44,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 487 transitions, 7744 flow, removed 61 selfloop flow, removed 1 redundant places. [2024-06-27 23:28:44,602 INFO L231 Difference]: Finished difference. Result has 340 places, 475 transitions, 6819 flow [2024-06-27 23:28:44,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6691, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6819, PETRI_PLACES=340, PETRI_TRANSITIONS=475} [2024-06-27 23:28:44,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-27 23:28:44,603 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 475 transitions, 6819 flow [2024-06-27 23:28:44,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:44,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:28:44,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:28:44,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 23:28:44,603 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:28:44,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:28:44,604 INFO L85 PathProgramCache]: Analyzing trace with hash 267865429, now seen corresponding path program 1 times [2024-06-27 23:28:44,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:28:44,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243708526] [2024-06-27 23:28:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:28:44,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:28:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:28:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:28:46,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:28:46,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243708526] [2024-06-27 23:28:46,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243708526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:28:46,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:28:46,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:28:46,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038159425] [2024-06-27 23:28:46,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:28:46,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:28:46,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:28:46,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:28:46,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:28:46,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:28:46,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 475 transitions, 6819 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:46,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:28:46,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:28:46,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:28:48,340 INFO L124 PetriNetUnfolderBase]: 4440/7144 cut-off events. [2024-06-27 23:28:48,340 INFO L125 PetriNetUnfolderBase]: For 925909/925912 co-relation queries the response was YES. [2024-06-27 23:28:48,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64234 conditions, 7144 events. 4440/7144 cut-off events. For 925909/925912 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 46278 event pairs, 1037 based on Foata normal form. 4/7143 useless extension candidates. Maximal degree in co-relation 64063. Up to 6861 conditions per place. [2024-06-27 23:28:48,446 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 457 selfloop transitions, 56 changer transitions 0/517 dead transitions. [2024-06-27 23:28:48,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 517 transitions, 8585 flow [2024-06-27 23:28:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:28:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:28:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 23:28:48,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121951219512195 [2024-06-27 23:28:48,448 INFO L175 Difference]: Start difference. First operand has 340 places, 475 transitions, 6819 flow. Second operand 10 states and 169 transitions. [2024-06-27 23:28:48,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 517 transitions, 8585 flow [2024-06-27 23:28:51,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 517 transitions, 8498 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 23:28:51,810 INFO L231 Difference]: Finished difference. Result has 349 places, 497 transitions, 7224 flow [2024-06-27 23:28:51,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6732, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7224, PETRI_PLACES=349, PETRI_TRANSITIONS=497} [2024-06-27 23:28:51,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-27 23:28:51,811 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 497 transitions, 7224 flow [2024-06-27 23:28:51,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:51,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:28:51,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:28:51,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 23:28:51,811 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:28:51,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:28:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1466045931, now seen corresponding path program 7 times [2024-06-27 23:28:51,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:28:51,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456537996] [2024-06-27 23:28:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:28:51,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:28:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:28:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:28:53,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:28:53,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456537996] [2024-06-27 23:28:53,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456537996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:28:53,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:28:53,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:28:53,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807535069] [2024-06-27 23:28:53,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:28:53,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:28:53,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:28:53,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:28:53,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:28:54,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:28:54,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 497 transitions, 7224 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:54,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:28:54,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:28:54,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:28:56,165 INFO L124 PetriNetUnfolderBase]: 4430/7171 cut-off events. [2024-06-27 23:28:56,166 INFO L125 PetriNetUnfolderBase]: For 991033/991033 co-relation queries the response was YES. [2024-06-27 23:28:56,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65370 conditions, 7171 events. 4430/7171 cut-off events. For 991033/991033 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 46792 event pairs, 894 based on Foata normal form. 12/7169 useless extension candidates. Maximal degree in co-relation 65194. Up to 6445 conditions per place. [2024-06-27 23:28:56,500 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 378 selfloop transitions, 134 changer transitions 0/534 dead transitions. [2024-06-27 23:28:56,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 534 transitions, 8484 flow [2024-06-27 23:28:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:28:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:28:56,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-27 23:28:56,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2024-06-27 23:28:56,502 INFO L175 Difference]: Start difference. First operand has 349 places, 497 transitions, 7224 flow. Second operand 11 states and 200 transitions. [2024-06-27 23:28:56,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 534 transitions, 8484 flow [2024-06-27 23:28:59,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 534 transitions, 8314 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-27 23:28:59,743 INFO L231 Difference]: Finished difference. Result has 358 places, 500 transitions, 7439 flow [2024-06-27 23:28:59,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7054, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7439, PETRI_PLACES=358, PETRI_TRANSITIONS=500} [2024-06-27 23:28:59,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-27 23:28:59,743 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 500 transitions, 7439 flow [2024-06-27 23:28:59,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:28:59,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:28:59,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:28:59,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 23:28:59,744 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:28:59,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:28:59,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1325670447, now seen corresponding path program 8 times [2024-06-27 23:28:59,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:28:59,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740093203] [2024-06-27 23:28:59,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:28:59,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:28:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:29:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:29:01,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:29:01,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740093203] [2024-06-27 23:29:01,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740093203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:29:01,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:29:01,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:29:01,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536058889] [2024-06-27 23:29:01,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:29:01,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:29:01,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:29:01,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:29:01,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:29:02,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:29:02,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 500 transitions, 7439 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:02,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:29:02,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:29:02,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:29:04,313 INFO L124 PetriNetUnfolderBase]: 4488/7269 cut-off events. [2024-06-27 23:29:04,313 INFO L125 PetriNetUnfolderBase]: For 1022211/1022211 co-relation queries the response was YES. [2024-06-27 23:29:04,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66682 conditions, 7269 events. 4488/7269 cut-off events. For 1022211/1022211 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 47588 event pairs, 904 based on Foata normal form. 12/7267 useless extension candidates. Maximal degree in co-relation 66504. Up to 6543 conditions per place. [2024-06-27 23:29:04,430 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 392 selfloop transitions, 123 changer transitions 0/537 dead transitions. [2024-06-27 23:29:04,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 537 transitions, 8711 flow [2024-06-27 23:29:04,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:29:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:29:04,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-27 23:29:04,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-27 23:29:04,431 INFO L175 Difference]: Start difference. First operand has 358 places, 500 transitions, 7439 flow. Second operand 11 states and 201 transitions. [2024-06-27 23:29:04,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 537 transitions, 8711 flow [2024-06-27 23:29:06,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 537 transitions, 8374 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-27 23:29:06,836 INFO L231 Difference]: Finished difference. Result has 362 places, 503 transitions, 7471 flow [2024-06-27 23:29:06,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7102, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7471, PETRI_PLACES=362, PETRI_TRANSITIONS=503} [2024-06-27 23:29:06,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-27 23:29:06,836 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 503 transitions, 7471 flow [2024-06-27 23:29:06,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:06,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:29:06,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:29:06,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 23:29:06,837 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:29:06,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:29:06,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1496372877, now seen corresponding path program 9 times [2024-06-27 23:29:06,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:29:06,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955227717] [2024-06-27 23:29:06,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:29:06,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:29:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:29:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:29:08,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:29:08,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955227717] [2024-06-27 23:29:08,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955227717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:29:08,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:29:08,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:29:08,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517361331] [2024-06-27 23:29:08,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:29:08,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:29:08,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:29:08,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:29:08,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:29:09,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:29:09,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 503 transitions, 7471 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:09,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:29:09,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:29:09,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:29:11,430 INFO L124 PetriNetUnfolderBase]: 4546/7367 cut-off events. [2024-06-27 23:29:11,430 INFO L125 PetriNetUnfolderBase]: For 1043805/1043805 co-relation queries the response was YES. [2024-06-27 23:29:11,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67431 conditions, 7367 events. 4546/7367 cut-off events. For 1043805/1043805 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 48348 event pairs, 929 based on Foata normal form. 12/7365 useless extension candidates. Maximal degree in co-relation 67251. Up to 6641 conditions per place. [2024-06-27 23:29:11,524 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 396 selfloop transitions, 122 changer transitions 0/540 dead transitions. [2024-06-27 23:29:11,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 540 transitions, 8755 flow [2024-06-27 23:29:11,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:29:11,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:29:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-27 23:29:11,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44789356984478934 [2024-06-27 23:29:11,526 INFO L175 Difference]: Start difference. First operand has 362 places, 503 transitions, 7471 flow. Second operand 11 states and 202 transitions. [2024-06-27 23:29:11,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 540 transitions, 8755 flow [2024-06-27 23:29:13,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 540 transitions, 8438 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-27 23:29:13,727 INFO L231 Difference]: Finished difference. Result has 366 places, 506 transitions, 7527 flow [2024-06-27 23:29:13,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7154, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7527, PETRI_PLACES=366, PETRI_TRANSITIONS=506} [2024-06-27 23:29:13,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-27 23:29:13,727 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 506 transitions, 7527 flow [2024-06-27 23:29:13,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:13,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:29:13,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:29:13,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 23:29:13,728 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:29:13,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:29:13,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1325555127, now seen corresponding path program 10 times [2024-06-27 23:29:13,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:29:13,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895359668] [2024-06-27 23:29:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:29:13,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:29:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:29:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:29:15,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:29:15,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895359668] [2024-06-27 23:29:15,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895359668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:29:15,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:29:15,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:29:15,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639972721] [2024-06-27 23:29:15,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:29:15,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:29:15,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:29:15,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:29:15,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:29:15,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:29:15,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 506 transitions, 7527 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:15,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:29:15,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:29:15,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:29:18,111 INFO L124 PetriNetUnfolderBase]: 4587/7438 cut-off events. [2024-06-27 23:29:18,111 INFO L125 PetriNetUnfolderBase]: For 1064184/1064184 co-relation queries the response was YES. [2024-06-27 23:29:18,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68106 conditions, 7438 events. 4587/7438 cut-off events. For 1064184/1064184 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 48962 event pairs, 923 based on Foata normal form. 12/7436 useless extension candidates. Maximal degree in co-relation 67924. Up to 6635 conditions per place. [2024-06-27 23:29:18,235 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 392 selfloop transitions, 130 changer transitions 0/544 dead transitions. [2024-06-27 23:29:18,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 544 transitions, 8837 flow [2024-06-27 23:29:18,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:29:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:29:18,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 23:29:18,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-27 23:29:18,239 INFO L175 Difference]: Start difference. First operand has 366 places, 506 transitions, 7527 flow. Second operand 10 states and 192 transitions. [2024-06-27 23:29:18,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 544 transitions, 8837 flow [2024-06-27 23:29:21,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 544 transitions, 8516 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 23:29:21,135 INFO L231 Difference]: Finished difference. Result has 369 places, 509 transitions, 7618 flow [2024-06-27 23:29:21,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7206, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7618, PETRI_PLACES=369, PETRI_TRANSITIONS=509} [2024-06-27 23:29:21,136 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-27 23:29:21,136 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 509 transitions, 7618 flow [2024-06-27 23:29:21,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:21,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:29:21,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:29:21,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 23:29:21,136 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:29:21,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:29:21,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1458253397, now seen corresponding path program 3 times [2024-06-27 23:29:21,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:29:21,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055672602] [2024-06-27 23:29:21,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:29:21,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:29:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:29:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:29:22,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:29:22,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055672602] [2024-06-27 23:29:22,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055672602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:29:22,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:29:22,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:29:22,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935311098] [2024-06-27 23:29:22,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:29:22,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:29:22,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:29:22,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:29:22,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:29:22,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:29:22,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 509 transitions, 7618 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:22,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:29:22,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:29:22,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:29:24,343 INFO L124 PetriNetUnfolderBase]: 4668/7529 cut-off events. [2024-06-27 23:29:24,343 INFO L125 PetriNetUnfolderBase]: For 1035254/1035260 co-relation queries the response was YES. [2024-06-27 23:29:24,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68771 conditions, 7529 events. 4668/7529 cut-off events. For 1035254/1035260 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 49264 event pairs, 1102 based on Foata normal form. 5/7526 useless extension candidates. Maximal degree in co-relation 68587. Up to 7224 conditions per place. [2024-06-27 23:29:24,463 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 471 selfloop transitions, 60 changer transitions 0/535 dead transitions. [2024-06-27 23:29:24,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 535 transitions, 9316 flow [2024-06-27 23:29:24,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:29:24,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:29:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 23:29:24,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-27 23:29:24,465 INFO L175 Difference]: Start difference. First operand has 369 places, 509 transitions, 7618 flow. Second operand 8 states and 137 transitions. [2024-06-27 23:29:24,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 535 transitions, 9316 flow [2024-06-27 23:29:27,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 535 transitions, 8954 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-27 23:29:27,542 INFO L231 Difference]: Finished difference. Result has 370 places, 518 transitions, 7574 flow [2024-06-27 23:29:27,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7256, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7574, PETRI_PLACES=370, PETRI_TRANSITIONS=518} [2024-06-27 23:29:27,542 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-27 23:29:27,543 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 518 transitions, 7574 flow [2024-06-27 23:29:27,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:27,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:29:27,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:29:27,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 23:29:27,543 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:29:27,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:29:27,544 INFO L85 PathProgramCache]: Analyzing trace with hash -456781703, now seen corresponding path program 4 times [2024-06-27 23:29:27,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:29:27,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975546702] [2024-06-27 23:29:27,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:29:27,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:29:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:29:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:29:28,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:29:28,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975546702] [2024-06-27 23:29:28,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975546702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:29:28,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:29:28,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:29:28,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850518646] [2024-06-27 23:29:28,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:29:28,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:29:28,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:29:28,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:29:28,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:29:28,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:29:28,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 518 transitions, 7574 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:28,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:29:28,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:29:28,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:29:30,683 INFO L124 PetriNetUnfolderBase]: 4681/7547 cut-off events. [2024-06-27 23:29:30,683 INFO L125 PetriNetUnfolderBase]: For 1047499/1047505 co-relation queries the response was YES. [2024-06-27 23:29:30,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68697 conditions, 7547 events. 4681/7547 cut-off events. For 1047499/1047505 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 49416 event pairs, 1107 based on Foata normal form. 5/7544 useless extension candidates. Maximal degree in co-relation 68512. Up to 7239 conditions per place. [2024-06-27 23:29:30,804 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 466 selfloop transitions, 68 changer transitions 0/538 dead transitions. [2024-06-27 23:29:30,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 538 transitions, 9220 flow [2024-06-27 23:29:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:29:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:29:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 23:29:30,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-27 23:29:30,806 INFO L175 Difference]: Start difference. First operand has 370 places, 518 transitions, 7574 flow. Second operand 7 states and 125 transitions. [2024-06-27 23:29:30,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 538 transitions, 9220 flow [2024-06-27 23:29:34,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 538 transitions, 9048 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-06-27 23:29:34,352 INFO L231 Difference]: Finished difference. Result has 374 places, 524 transitions, 7680 flow [2024-06-27 23:29:34,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7446, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7680, PETRI_PLACES=374, PETRI_TRANSITIONS=524} [2024-06-27 23:29:34,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-27 23:29:34,352 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 524 transitions, 7680 flow [2024-06-27 23:29:34,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:34,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:29:34,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:29:34,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 23:29:34,353 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:29:34,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:29:34,353 INFO L85 PathProgramCache]: Analyzing trace with hash -947273673, now seen corresponding path program 5 times [2024-06-27 23:29:34,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:29:34,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692528602] [2024-06-27 23:29:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:29:34,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:29:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:29:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:29:35,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:29:35,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692528602] [2024-06-27 23:29:35,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692528602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:29:35,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:29:35,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:29:35,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638567274] [2024-06-27 23:29:35,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:29:35,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:29:35,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:29:35,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:29:35,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:29:35,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:29:35,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 524 transitions, 7680 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:35,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:29:35,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:29:35,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:29:37,508 INFO L124 PetriNetUnfolderBase]: 4678/7543 cut-off events. [2024-06-27 23:29:37,508 INFO L125 PetriNetUnfolderBase]: For 1059431/1059437 co-relation queries the response was YES. [2024-06-27 23:29:37,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68760 conditions, 7543 events. 4678/7543 cut-off events. For 1059431/1059437 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 49342 event pairs, 1102 based on Foata normal form. 5/7540 useless extension candidates. Maximal degree in co-relation 68573. Up to 7311 conditions per place. [2024-06-27 23:29:37,615 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 496 selfloop transitions, 33 changer transitions 0/533 dead transitions. [2024-06-27 23:29:37,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 533 transitions, 8764 flow [2024-06-27 23:29:37,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:29:37,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:29:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 23:29:37,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-27 23:29:37,617 INFO L175 Difference]: Start difference. First operand has 374 places, 524 transitions, 7680 flow. Second operand 7 states and 117 transitions. [2024-06-27 23:29:37,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 533 transitions, 8764 flow [2024-06-27 23:29:41,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 533 transitions, 8634 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 23:29:41,420 INFO L231 Difference]: Finished difference. Result has 378 places, 524 transitions, 7622 flow [2024-06-27 23:29:41,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7550, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7622, PETRI_PLACES=378, PETRI_TRANSITIONS=524} [2024-06-27 23:29:41,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-27 23:29:41,421 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 524 transitions, 7622 flow [2024-06-27 23:29:41,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:41,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:29:41,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:29:41,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 23:29:41,421 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:29:41,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:29:41,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1629176235, now seen corresponding path program 6 times [2024-06-27 23:29:41,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:29:41,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946236497] [2024-06-27 23:29:41,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:29:41,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:29:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:29:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:29:42,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:29:42,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946236497] [2024-06-27 23:29:42,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946236497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:29:42,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:29:42,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:29:42,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378856861] [2024-06-27 23:29:42,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:29:42,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:29:42,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:29:42,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:29:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:29:42,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:29:42,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 524 transitions, 7622 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:42,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:29:42,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:29:42,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:29:44,547 INFO L124 PetriNetUnfolderBase]: 4675/7537 cut-off events. [2024-06-27 23:29:44,548 INFO L125 PetriNetUnfolderBase]: For 1072123/1072129 co-relation queries the response was YES. [2024-06-27 23:29:44,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68698 conditions, 7537 events. 4675/7537 cut-off events. For 1072123/1072129 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 49297 event pairs, 1102 based on Foata normal form. 5/7534 useless extension candidates. Maximal degree in co-relation 68510. Up to 7292 conditions per place. [2024-06-27 23:29:44,665 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 486 selfloop transitions, 44 changer transitions 0/534 dead transitions. [2024-06-27 23:29:44,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 534 transitions, 8914 flow [2024-06-27 23:29:44,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:29:44,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:29:44,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 23:29:44,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 23:29:44,666 INFO L175 Difference]: Start difference. First operand has 378 places, 524 transitions, 7622 flow. Second operand 7 states and 119 transitions. [2024-06-27 23:29:44,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 534 transitions, 8914 flow [2024-06-27 23:29:48,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 534 transitions, 8808 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 23:29:48,267 INFO L231 Difference]: Finished difference. Result has 381 places, 524 transitions, 7610 flow [2024-06-27 23:29:48,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7516, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7610, PETRI_PLACES=381, PETRI_TRANSITIONS=524} [2024-06-27 23:29:48,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-27 23:29:48,268 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 524 transitions, 7610 flow [2024-06-27 23:29:48,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:48,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:29:48,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:29:48,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 23:29:48,268 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:29:48,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:29:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1621995209, now seen corresponding path program 2 times [2024-06-27 23:29:48,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:29:48,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386905722] [2024-06-27 23:29:48,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:29:48,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:29:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:29:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:29:49,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:29:49,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386905722] [2024-06-27 23:29:49,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386905722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:29:49,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:29:49,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:29:49,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884982153] [2024-06-27 23:29:49,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:29:49,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:29:49,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:29:49,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:29:49,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:29:49,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:29:49,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 524 transitions, 7610 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:49,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:29:49,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:29:49,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:29:52,127 INFO L124 PetriNetUnfolderBase]: 4701/7573 cut-off events. [2024-06-27 23:29:52,127 INFO L125 PetriNetUnfolderBase]: For 1106440/1106446 co-relation queries the response was YES. [2024-06-27 23:29:52,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69301 conditions, 7573 events. 4701/7573 cut-off events. For 1106440/1106446 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 49475 event pairs, 1103 based on Foata normal form. 6/7571 useless extension candidates. Maximal degree in co-relation 69111. Up to 7279 conditions per place. [2024-06-27 23:29:52,248 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 478 selfloop transitions, 66 changer transitions 0/548 dead transitions. [2024-06-27 23:29:52,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 548 transitions, 9253 flow [2024-06-27 23:29:52,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:29:52,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:29:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 23:29:52,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975609756097561 [2024-06-27 23:29:52,249 INFO L175 Difference]: Start difference. First operand has 381 places, 524 transitions, 7610 flow. Second operand 10 states and 163 transitions. [2024-06-27 23:29:52,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 548 transitions, 9253 flow [2024-06-27 23:29:55,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 548 transitions, 9127 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 23:29:55,916 INFO L231 Difference]: Finished difference. Result has 386 places, 531 transitions, 7717 flow [2024-06-27 23:29:55,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7484, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7717, PETRI_PLACES=386, PETRI_TRANSITIONS=531} [2024-06-27 23:29:55,917 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-27 23:29:55,917 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 531 transitions, 7717 flow [2024-06-27 23:29:55,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:55,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:29:55,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:29:55,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 23:29:55,917 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:29:55,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:29:55,917 INFO L85 PathProgramCache]: Analyzing trace with hash 587197095, now seen corresponding path program 3 times [2024-06-27 23:29:55,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:29:55,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256462259] [2024-06-27 23:29:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:29:55,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:29:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:29:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:29:57,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:29:57,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256462259] [2024-06-27 23:29:57,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256462259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:29:57,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:29:57,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:29:57,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287650840] [2024-06-27 23:29:57,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:29:57,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:29:57,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:29:57,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:29:57,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:29:58,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:29:58,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 531 transitions, 7717 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:29:58,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:29:58,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:29:58,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:00,341 INFO L124 PetriNetUnfolderBase]: 4695/7567 cut-off events. [2024-06-27 23:30:00,341 INFO L125 PetriNetUnfolderBase]: For 1115039/1115039 co-relation queries the response was YES. [2024-06-27 23:30:00,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69267 conditions, 7567 events. 4695/7567 cut-off events. For 1115039/1115039 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 49634 event pairs, 1529 based on Foata normal form. 2/7566 useless extension candidates. Maximal degree in co-relation 69076. Up to 7352 conditions per place. [2024-06-27 23:30:00,443 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 514 selfloop transitions, 23 changer transitions 0/541 dead transitions. [2024-06-27 23:30:00,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 541 transitions, 8821 flow [2024-06-27 23:30:00,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:30:00,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:30:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 23:30:00,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-27 23:30:00,445 INFO L175 Difference]: Start difference. First operand has 386 places, 531 transitions, 7717 flow. Second operand 8 states and 127 transitions. [2024-06-27 23:30:00,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 541 transitions, 8821 flow [2024-06-27 23:30:05,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 541 transitions, 8675 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-27 23:30:05,597 INFO L231 Difference]: Finished difference. Result has 391 places, 531 transitions, 7628 flow [2024-06-27 23:30:05,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7571, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7628, PETRI_PLACES=391, PETRI_TRANSITIONS=531} [2024-06-27 23:30:05,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-27 23:30:05,598 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 531 transitions, 7628 flow [2024-06-27 23:30:05,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:05,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:05,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:05,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 23:30:05,598 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:05,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:05,598 INFO L85 PathProgramCache]: Analyzing trace with hash 586809285, now seen corresponding path program 4 times [2024-06-27 23:30:05,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:05,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852428028] [2024-06-27 23:30:05,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:05,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:30:07,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:07,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852428028] [2024-06-27 23:30:07,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852428028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:07,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:07,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:30:07,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968912093] [2024-06-27 23:30:07,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:07,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:30:07,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:07,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:30:07,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:30:07,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:30:07,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 531 transitions, 7628 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:07,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:07,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:30:07,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:09,562 INFO L124 PetriNetUnfolderBase]: 4689/7559 cut-off events. [2024-06-27 23:30:09,563 INFO L125 PetriNetUnfolderBase]: For 1121354/1121360 co-relation queries the response was YES. [2024-06-27 23:30:09,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68976 conditions, 7559 events. 4689/7559 cut-off events. For 1121354/1121360 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 49443 event pairs, 1101 based on Foata normal form. 6/7557 useless extension candidates. Maximal degree in co-relation 68783. Up to 7269 conditions per place. [2024-06-27 23:30:09,682 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 480 selfloop transitions, 63 changer transitions 0/547 dead transitions. [2024-06-27 23:30:09,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 547 transitions, 8970 flow [2024-06-27 23:30:09,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:30:09,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:30:09,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-27 23:30:09,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38137472283813745 [2024-06-27 23:30:09,683 INFO L175 Difference]: Start difference. First operand has 391 places, 531 transitions, 7628 flow. Second operand 11 states and 172 transitions. [2024-06-27 23:30:09,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 547 transitions, 8970 flow [2024-06-27 23:30:14,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 547 transitions, 8876 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 23:30:14,134 INFO L231 Difference]: Finished difference. Result has 396 places, 531 transitions, 7666 flow [2024-06-27 23:30:14,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7534, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7666, PETRI_PLACES=396, PETRI_TRANSITIONS=531} [2024-06-27 23:30:14,135 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 354 predicate places. [2024-06-27 23:30:14,135 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 531 transitions, 7666 flow [2024-06-27 23:30:14,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:14,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:14,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:14,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 23:30:14,135 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:14,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:14,135 INFO L85 PathProgramCache]: Analyzing trace with hash -840579465, now seen corresponding path program 11 times [2024-06-27 23:30:14,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:14,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27958952] [2024-06-27 23:30:14,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:14,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:30:16,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:16,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27958952] [2024-06-27 23:30:16,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27958952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:16,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:16,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:30:16,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096438616] [2024-06-27 23:30:16,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:16,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:30:16,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:16,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:30:16,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:30:16,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:30:16,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 531 transitions, 7666 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:16,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:16,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:30:16,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:18,737 INFO L124 PetriNetUnfolderBase]: 4716/7646 cut-off events. [2024-06-27 23:30:18,737 INFO L125 PetriNetUnfolderBase]: For 1193858/1193860 co-relation queries the response was YES. [2024-06-27 23:30:18,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70217 conditions, 7646 events. 4716/7646 cut-off events. For 1193858/1193860 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 50550 event pairs, 941 based on Foata normal form. 14/7657 useless extension candidates. Maximal degree in co-relation 70024. Up to 7001 conditions per place. [2024-06-27 23:30:18,843 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 484 selfloop transitions, 69 changer transitions 0/580 dead transitions. [2024-06-27 23:30:18,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 580 transitions, 9121 flow [2024-06-27 23:30:18,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:30:18,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:30:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-27 23:30:18,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458980044345898 [2024-06-27 23:30:18,844 INFO L175 Difference]: Start difference. First operand has 396 places, 531 transitions, 7666 flow. Second operand 11 states and 207 transitions. [2024-06-27 23:30:18,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 580 transitions, 9121 flow [2024-06-27 23:30:22,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 580 transitions, 8970 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 23:30:22,832 INFO L231 Difference]: Finished difference. Result has 399 places, 539 transitions, 7882 flow [2024-06-27 23:30:22,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7515, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7882, PETRI_PLACES=399, PETRI_TRANSITIONS=539} [2024-06-27 23:30:22,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-27 23:30:22,832 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 539 transitions, 7882 flow [2024-06-27 23:30:22,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:22,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:22,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:22,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 23:30:22,833 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:22,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:22,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1860639023, now seen corresponding path program 12 times [2024-06-27 23:30:22,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:22,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870774526] [2024-06-27 23:30:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:22,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:30:24,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:24,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870774526] [2024-06-27 23:30:24,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870774526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:24,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:24,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:30:24,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182604204] [2024-06-27 23:30:24,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:24,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:30:24,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:24,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:30:24,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:30:24,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:30:24,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 539 transitions, 7882 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:24,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:24,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:30:24,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:26,999 INFO L124 PetriNetUnfolderBase]: 4853/7831 cut-off events. [2024-06-27 23:30:26,999 INFO L125 PetriNetUnfolderBase]: For 1229382/1229384 co-relation queries the response was YES. [2024-06-27 23:30:27,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72333 conditions, 7831 events. 4853/7831 cut-off events. For 1229382/1229384 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 51614 event pairs, 1100 based on Foata normal form. 14/7842 useless extension candidates. Maximal degree in co-relation 72138. Up to 7327 conditions per place. [2024-06-27 23:30:27,126 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 529 selfloop transitions, 57 changer transitions 0/590 dead transitions. [2024-06-27 23:30:27,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 590 transitions, 9401 flow [2024-06-27 23:30:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:30:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:30:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-27 23:30:27,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43458980044345896 [2024-06-27 23:30:27,128 INFO L175 Difference]: Start difference. First operand has 399 places, 539 transitions, 7882 flow. Second operand 11 states and 196 transitions. [2024-06-27 23:30:27,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 590 transitions, 9401 flow [2024-06-27 23:30:32,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 590 transitions, 9176 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-27 23:30:32,102 INFO L231 Difference]: Finished difference. Result has 403 places, 545 transitions, 7977 flow [2024-06-27 23:30:32,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7657, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7977, PETRI_PLACES=403, PETRI_TRANSITIONS=545} [2024-06-27 23:30:32,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-27 23:30:32,103 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 545 transitions, 7977 flow [2024-06-27 23:30:32,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:32,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:32,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:32,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 23:30:32,103 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:32,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:32,104 INFO L85 PathProgramCache]: Analyzing trace with hash -930974365, now seen corresponding path program 13 times [2024-06-27 23:30:32,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:32,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353356756] [2024-06-27 23:30:32,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:32,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:30:33,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:33,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353356756] [2024-06-27 23:30:33,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353356756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:33,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:33,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:30:33,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981854111] [2024-06-27 23:30:33,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:33,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:30:33,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:33,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:30:33,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:30:33,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:30:33,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 545 transitions, 7977 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:33,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:33,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:30:33,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:36,174 INFO L124 PetriNetUnfolderBase]: 4900/7964 cut-off events. [2024-06-27 23:30:36,175 INFO L125 PetriNetUnfolderBase]: For 1260153/1260155 co-relation queries the response was YES. [2024-06-27 23:30:36,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73467 conditions, 7964 events. 4900/7964 cut-off events. For 1260153/1260155 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 53232 event pairs, 1118 based on Foata normal form. 14/7969 useless extension candidates. Maximal degree in co-relation 73270. Up to 7278 conditions per place. [2024-06-27 23:30:36,315 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 497 selfloop transitions, 72 changer transitions 0/596 dead transitions. [2024-06-27 23:30:36,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 596 transitions, 9499 flow [2024-06-27 23:30:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:30:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:30:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-27 23:30:36,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458980044345898 [2024-06-27 23:30:36,317 INFO L175 Difference]: Start difference. First operand has 403 places, 545 transitions, 7977 flow. Second operand 11 states and 207 transitions. [2024-06-27 23:30:36,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 596 transitions, 9499 flow [2024-06-27 23:30:40,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 596 transitions, 9294 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-27 23:30:40,517 INFO L231 Difference]: Finished difference. Result has 407 places, 553 transitions, 8178 flow [2024-06-27 23:30:40,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7772, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8178, PETRI_PLACES=407, PETRI_TRANSITIONS=553} [2024-06-27 23:30:40,518 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-27 23:30:40,518 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 553 transitions, 8178 flow [2024-06-27 23:30:40,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:40,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:40,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:40,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 23:30:40,519 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:40,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:40,519 INFO L85 PathProgramCache]: Analyzing trace with hash -779516425, now seen corresponding path program 14 times [2024-06-27 23:30:40,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:40,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827682611] [2024-06-27 23:30:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:40,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:30:42,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:42,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827682611] [2024-06-27 23:30:42,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827682611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:42,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:42,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:30:42,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538956464] [2024-06-27 23:30:42,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:42,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:30:42,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:42,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:30:42,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:30:42,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:30:42,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 553 transitions, 8178 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:42,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:42,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:30:42,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:45,283 INFO L124 PetriNetUnfolderBase]: 5033/8147 cut-off events. [2024-06-27 23:30:45,283 INFO L125 PetriNetUnfolderBase]: For 1279063/1279065 co-relation queries the response was YES. [2024-06-27 23:30:45,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74962 conditions, 8147 events. 5033/8147 cut-off events. For 1279063/1279065 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 54186 event pairs, 1271 based on Foata normal form. 14/8158 useless extension candidates. Maximal degree in co-relation 74763. Up to 7695 conditions per place. [2024-06-27 23:30:45,395 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 531 selfloop transitions, 64 changer transitions 0/599 dead transitions. [2024-06-27 23:30:45,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 599 transitions, 9687 flow [2024-06-27 23:30:45,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:30:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:30:45,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-27 23:30:45,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43237250554323725 [2024-06-27 23:30:45,396 INFO L175 Difference]: Start difference. First operand has 407 places, 553 transitions, 8178 flow. Second operand 11 states and 195 transitions. [2024-06-27 23:30:45,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 599 transitions, 9687 flow [2024-06-27 23:30:51,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 599 transitions, 9451 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-27 23:30:51,708 INFO L231 Difference]: Finished difference. Result has 411 places, 557 transitions, 8257 flow [2024-06-27 23:30:51,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7946, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8257, PETRI_PLACES=411, PETRI_TRANSITIONS=557} [2024-06-27 23:30:51,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-27 23:30:51,708 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 557 transitions, 8257 flow [2024-06-27 23:30:51,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:51,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:51,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:51,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 23:30:51,709 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:51,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:51,709 INFO L85 PathProgramCache]: Analyzing trace with hash -655094153, now seen corresponding path program 15 times [2024-06-27 23:30:51,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:51,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119879407] [2024-06-27 23:30:51,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:51,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:30:53,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:53,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119879407] [2024-06-27 23:30:53,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119879407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:53,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:53,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:30:53,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730205303] [2024-06-27 23:30:53,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:53,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:30:53,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:53,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:30:53,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:30:53,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-27 23:30:53,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 557 transitions, 8257 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:53,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:53,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-27 23:30:53,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:55,526 INFO L124 PetriNetUnfolderBase]: 4018/7134 cut-off events. [2024-06-27 23:30:55,526 INFO L125 PetriNetUnfolderBase]: For 1303809/1303892 co-relation queries the response was YES. [2024-06-27 23:30:55,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69046 conditions, 7134 events. 4018/7134 cut-off events. For 1303809/1303892 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 52956 event pairs, 523 based on Foata normal form. 54/7051 useless extension candidates. Maximal degree in co-relation 68845. Up to 4957 conditions per place. [2024-06-27 23:30:55,641 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 360 selfloop transitions, 117 changer transitions 0/603 dead transitions. [2024-06-27 23:30:55,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 603 transitions, 9613 flow [2024-06-27 23:30:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:30:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:30:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-27 23:30:55,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-27 23:30:55,642 INFO L175 Difference]: Start difference. First operand has 411 places, 557 transitions, 8257 flow. Second operand 10 states and 211 transitions. [2024-06-27 23:30:55,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 603 transitions, 9613 flow [2024-06-27 23:31:01,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 603 transitions, 9400 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-27 23:31:01,012 INFO L231 Difference]: Finished difference. Result has 413 places, 565 transitions, 8636 flow [2024-06-27 23:31:01,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8044, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8636, PETRI_PLACES=413, PETRI_TRANSITIONS=565} [2024-06-27 23:31:01,013 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-27 23:31:01,013 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 565 transitions, 8636 flow [2024-06-27 23:31:01,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:01,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:01,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:01,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 23:31:01,013 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:01,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:01,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1302902541, now seen corresponding path program 16 times [2024-06-27 23:31:01,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:01,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184428925] [2024-06-27 23:31:01,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:01,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:31:02,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:02,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184428925] [2024-06-27 23:31:02,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184428925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:02,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:02,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:31:02,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758993091] [2024-06-27 23:31:02,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:02,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:31:02,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:02,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:31:02,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:31:03,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:31:03,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 565 transitions, 8636 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:03,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:03,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:31:03,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:05,625 INFO L124 PetriNetUnfolderBase]: 5250/8546 cut-off events. [2024-06-27 23:31:05,625 INFO L125 PetriNetUnfolderBase]: For 1358022/1358024 co-relation queries the response was YES. [2024-06-27 23:31:05,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79829 conditions, 8546 events. 5250/8546 cut-off events. For 1358022/1358024 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 57904 event pairs, 1115 based on Foata normal form. 14/8557 useless extension candidates. Maximal degree in co-relation 79626. Up to 7821 conditions per place. [2024-06-27 23:31:05,770 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 525 selfloop transitions, 65 changer transitions 0/617 dead transitions. [2024-06-27 23:31:05,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 617 transitions, 10355 flow [2024-06-27 23:31:05,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:31:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:31:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-27 23:31:05,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567627494456763 [2024-06-27 23:31:05,772 INFO L175 Difference]: Start difference. First operand has 413 places, 565 transitions, 8636 flow. Second operand 11 states and 206 transitions. [2024-06-27 23:31:05,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 617 transitions, 10355 flow [2024-06-27 23:31:11,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 617 transitions, 9979 flow, removed 89 selfloop flow, removed 8 redundant places. [2024-06-27 23:31:11,762 INFO L231 Difference]: Finished difference. Result has 417 places, 574 transitions, 8810 flow [2024-06-27 23:31:11,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8346, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8810, PETRI_PLACES=417, PETRI_TRANSITIONS=574} [2024-06-27 23:31:11,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-27 23:31:11,762 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 574 transitions, 8810 flow [2024-06-27 23:31:11,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:11,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:11,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:11,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 23:31:11,763 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:11,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:11,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1447219989, now seen corresponding path program 17 times [2024-06-27 23:31:11,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:11,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732591480] [2024-06-27 23:31:11,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:11,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:31:13,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:13,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732591480] [2024-06-27 23:31:13,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732591480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:13,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:13,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:31:13,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476465932] [2024-06-27 23:31:13,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:13,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:31:13,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:13,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:31:13,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:31:14,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:31:14,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 574 transitions, 8810 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:14,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:14,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:31:14,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:16,562 INFO L124 PetriNetUnfolderBase]: 5345/8711 cut-off events. [2024-06-27 23:31:16,562 INFO L125 PetriNetUnfolderBase]: For 1350886/1350888 co-relation queries the response was YES. [2024-06-27 23:31:16,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80448 conditions, 8711 events. 5345/8711 cut-off events. For 1350886/1350888 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 59283 event pairs, 1217 based on Foata normal form. 14/8722 useless extension candidates. Maximal degree in co-relation 80244. Up to 8118 conditions per place. [2024-06-27 23:31:16,701 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 527 selfloop transitions, 64 changer transitions 0/618 dead transitions. [2024-06-27 23:31:16,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 618 transitions, 10323 flow [2024-06-27 23:31:16,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:31:16,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:31:16,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-27 23:31:16,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 23:31:16,703 INFO L175 Difference]: Start difference. First operand has 417 places, 574 transitions, 8810 flow. Second operand 11 states and 205 transitions. [2024-06-27 23:31:16,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 618 transitions, 10323 flow [2024-06-27 23:31:23,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 618 transitions, 10082 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-27 23:31:23,286 INFO L231 Difference]: Finished difference. Result has 422 places, 578 transitions, 8905 flow [2024-06-27 23:31:23,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8569, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8905, PETRI_PLACES=422, PETRI_TRANSITIONS=578} [2024-06-27 23:31:23,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-27 23:31:23,286 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 578 transitions, 8905 flow [2024-06-27 23:31:23,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:23,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:23,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:23,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 23:31:23,287 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:23,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:23,287 INFO L85 PathProgramCache]: Analyzing trace with hash 572884663, now seen corresponding path program 18 times [2024-06-27 23:31:23,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:23,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731223170] [2024-06-27 23:31:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:23,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:31:25,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:25,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731223170] [2024-06-27 23:31:25,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731223170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:25,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:25,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:31:25,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367597179] [2024-06-27 23:31:25,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:25,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:31:25,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:25,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:31:25,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:31:25,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:31:25,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 578 transitions, 8905 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:25,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:25,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:31:25,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:28,809 INFO L124 PetriNetUnfolderBase]: 5430/8846 cut-off events. [2024-06-27 23:31:28,809 INFO L125 PetriNetUnfolderBase]: For 1373619/1373619 co-relation queries the response was YES. [2024-06-27 23:31:28,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81323 conditions, 8846 events. 5430/8846 cut-off events. For 1373619/1373619 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 60291 event pairs, 1221 based on Foata normal form. 12/8855 useless extension candidates. Maximal degree in co-relation 81117. Up to 8212 conditions per place. [2024-06-27 23:31:28,941 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 501 selfloop transitions, 94 changer transitions 0/622 dead transitions. [2024-06-27 23:31:28,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 622 transitions, 10399 flow [2024-06-27 23:31:28,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:31:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:31:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-27 23:31:28,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458980044345898 [2024-06-27 23:31:28,943 INFO L175 Difference]: Start difference. First operand has 422 places, 578 transitions, 8905 flow. Second operand 11 states and 207 transitions. [2024-06-27 23:31:28,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 622 transitions, 10399 flow [2024-06-27 23:31:35,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 622 transitions, 10204 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 23:31:35,873 INFO L231 Difference]: Finished difference. Result has 426 places, 582 transitions, 9072 flow [2024-06-27 23:31:35,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8710, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9072, PETRI_PLACES=426, PETRI_TRANSITIONS=582} [2024-06-27 23:31:35,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-27 23:31:35,873 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 582 transitions, 9072 flow [2024-06-27 23:31:35,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:35,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:35,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:35,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 23:31:35,874 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:35,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:35,874 INFO L85 PathProgramCache]: Analyzing trace with hash 832311247, now seen corresponding path program 19 times [2024-06-27 23:31:35,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:35,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910225419] [2024-06-27 23:31:35,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:35,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:31:37,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:37,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910225419] [2024-06-27 23:31:37,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910225419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:37,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:37,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:31:37,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261632662] [2024-06-27 23:31:37,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:37,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:31:37,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:37,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:31:37,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:31:38,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:31:38,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 582 transitions, 9072 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:38,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:38,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:31:38,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:40,729 INFO L124 PetriNetUnfolderBase]: 5515/8989 cut-off events. [2024-06-27 23:31:40,729 INFO L125 PetriNetUnfolderBase]: For 1401577/1401577 co-relation queries the response was YES. [2024-06-27 23:31:40,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82601 conditions, 8989 events. 5515/8989 cut-off events. For 1401577/1401577 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 61455 event pairs, 1224 based on Foata normal form. 12/8998 useless extension candidates. Maximal degree in co-relation 82393. Up to 8263 conditions per place. [2024-06-27 23:31:40,891 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 499 selfloop transitions, 103 changer transitions 0/629 dead transitions. [2024-06-27 23:31:40,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 629 transitions, 10625 flow [2024-06-27 23:31:40,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:31:40,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:31:40,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 23:31:40,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611973392461197 [2024-06-27 23:31:40,893 INFO L175 Difference]: Start difference. First operand has 426 places, 582 transitions, 9072 flow. Second operand 11 states and 208 transitions. [2024-06-27 23:31:40,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 629 transitions, 10625 flow [2024-06-27 23:31:48,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 629 transitions, 10359 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-27 23:31:48,664 INFO L231 Difference]: Finished difference. Result has 430 places, 588 transitions, 9240 flow [2024-06-27 23:31:48,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8806, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9240, PETRI_PLACES=430, PETRI_TRANSITIONS=588} [2024-06-27 23:31:48,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-27 23:31:48,664 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 588 transitions, 9240 flow [2024-06-27 23:31:48,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:48,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:48,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:48,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 23:31:48,665 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:48,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:48,666 INFO L85 PathProgramCache]: Analyzing trace with hash 739118443, now seen corresponding path program 20 times [2024-06-27 23:31:48,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:48,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520112839] [2024-06-27 23:31:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:48,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:31:50,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:50,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520112839] [2024-06-27 23:31:50,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520112839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:50,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:50,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:31:50,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552353703] [2024-06-27 23:31:50,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:50,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:31:50,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:50,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:31:50,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:31:50,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:31:50,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 588 transitions, 9240 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:50,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:50,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:31:50,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:53,673 INFO L124 PetriNetUnfolderBase]: 5522/9002 cut-off events. [2024-06-27 23:31:53,673 INFO L125 PetriNetUnfolderBase]: For 1350937/1350937 co-relation queries the response was YES. [2024-06-27 23:31:53,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81208 conditions, 9002 events. 5522/9002 cut-off events. For 1350937/1350937 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 61633 event pairs, 1240 based on Foata normal form. 12/9011 useless extension candidates. Maximal degree in co-relation 80998. Up to 8368 conditions per place. [2024-06-27 23:31:53,820 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 503 selfloop transitions, 99 changer transitions 0/629 dead transitions. [2024-06-27 23:31:53,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 629 transitions, 10457 flow [2024-06-27 23:31:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:31:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:31:53,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-27 23:31:53,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 23:31:53,822 INFO L175 Difference]: Start difference. First operand has 430 places, 588 transitions, 9240 flow. Second operand 11 states and 205 transitions. [2024-06-27 23:31:53,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 629 transitions, 10457 flow [2024-06-27 23:32:02,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 629 transitions, 10135 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-06-27 23:32:02,145 INFO L231 Difference]: Finished difference. Result has 433 places, 589 transitions, 8993 flow [2024-06-27 23:32:02,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8744, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8993, PETRI_PLACES=433, PETRI_TRANSITIONS=589} [2024-06-27 23:32:02,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-27 23:32:02,145 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 589 transitions, 8993 flow [2024-06-27 23:32:02,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:02,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:02,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:02,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 23:32:02,146 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:02,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:02,146 INFO L85 PathProgramCache]: Analyzing trace with hash 93638805, now seen corresponding path program 7 times [2024-06-27 23:32:02,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:02,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118478836] [2024-06-27 23:32:02,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:02,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:32:03,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:03,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118478836] [2024-06-27 23:32:03,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118478836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:03,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:03,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:32:03,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911336829] [2024-06-27 23:32:03,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:03,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:32:03,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:03,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:32:03,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:32:03,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:32:03,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 589 transitions, 8993 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:03,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:03,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:32:03,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:05,632 INFO L124 PetriNetUnfolderBase]: 5611/9099 cut-off events. [2024-06-27 23:32:05,632 INFO L125 PetriNetUnfolderBase]: For 1304958/1304958 co-relation queries the response was YES. [2024-06-27 23:32:05,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81350 conditions, 9099 events. 5611/9099 cut-off events. For 1304958/1304958 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 61906 event pairs, 1295 based on Foata normal form. 2/9098 useless extension candidates. Maximal degree in co-relation 81138. Up to 8739 conditions per place. [2024-06-27 23:32:05,785 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 533 selfloop transitions, 87 changer transitions 0/624 dead transitions. [2024-06-27 23:32:05,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 624 transitions, 10743 flow [2024-06-27 23:32:05,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:32:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:32:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 23:32:05,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 23:32:05,786 INFO L175 Difference]: Start difference. First operand has 433 places, 589 transitions, 8993 flow. Second operand 8 states and 147 transitions. [2024-06-27 23:32:05,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 624 transitions, 10743 flow [2024-06-27 23:32:12,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 624 transitions, 10441 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-27 23:32:12,046 INFO L231 Difference]: Finished difference. Result has 434 places, 601 transitions, 9142 flow [2024-06-27 23:32:12,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8691, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9142, PETRI_PLACES=434, PETRI_TRANSITIONS=601} [2024-06-27 23:32:12,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-27 23:32:12,046 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 601 transitions, 9142 flow [2024-06-27 23:32:12,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:12,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:12,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:12,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 23:32:12,046 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:12,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:12,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1388342025, now seen corresponding path program 8 times [2024-06-27 23:32:12,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:12,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360214067] [2024-06-27 23:32:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:12,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:32:13,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:13,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360214067] [2024-06-27 23:32:13,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360214067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:13,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:13,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:32:13,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375290965] [2024-06-27 23:32:13,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:13,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:32:13,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:32:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:32:13,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:32:13,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 601 transitions, 9142 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:13,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:13,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:32:13,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:15,700 INFO L124 PetriNetUnfolderBase]: 5605/9091 cut-off events. [2024-06-27 23:32:15,700 INFO L125 PetriNetUnfolderBase]: For 1299411/1299411 co-relation queries the response was YES. [2024-06-27 23:32:15,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81167 conditions, 9091 events. 5605/9091 cut-off events. For 1299411/1299411 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 61808 event pairs, 1291 based on Foata normal form. 2/9090 useless extension candidates. Maximal degree in co-relation 80953. Up to 8797 conditions per place. [2024-06-27 23:32:15,850 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 552 selfloop transitions, 64 changer transitions 0/620 dead transitions. [2024-06-27 23:32:15,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 620 transitions, 10440 flow [2024-06-27 23:32:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:32:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:32:15,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 23:32:15,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 23:32:15,851 INFO L175 Difference]: Start difference. First operand has 434 places, 601 transitions, 9142 flow. Second operand 8 states and 141 transitions. [2024-06-27 23:32:15,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 620 transitions, 10440 flow [2024-06-27 23:32:22,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 620 transitions, 10238 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-27 23:32:22,109 INFO L231 Difference]: Finished difference. Result has 438 places, 601 transitions, 9083 flow [2024-06-27 23:32:22,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8940, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9083, PETRI_PLACES=438, PETRI_TRANSITIONS=601} [2024-06-27 23:32:22,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-27 23:32:22,109 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 601 transitions, 9083 flow [2024-06-27 23:32:22,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:22,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:22,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:22,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 23:32:22,110 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:22,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:22,110 INFO L85 PathProgramCache]: Analyzing trace with hash 99360661, now seen corresponding path program 5 times [2024-06-27 23:32:22,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:22,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664662375] [2024-06-27 23:32:22,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:22,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:32:23,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:23,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664662375] [2024-06-27 23:32:23,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664662375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:23,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:23,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:32:23,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65934508] [2024-06-27 23:32:23,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:23,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:32:23,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:23,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:32:23,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:32:23,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:32:23,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 601 transitions, 9083 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:23,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:23,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:32:23,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:26,420 INFO L124 PetriNetUnfolderBase]: 5609/9103 cut-off events. [2024-06-27 23:32:26,420 INFO L125 PetriNetUnfolderBase]: For 1305327/1305329 co-relation queries the response was YES. [2024-06-27 23:32:26,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81128 conditions, 9103 events. 5609/9103 cut-off events. For 1305327/1305329 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 62043 event pairs, 1605 based on Foata normal form. 4/9104 useless extension candidates. Maximal degree in co-relation 80912. Up to 8848 conditions per place. [2024-06-27 23:32:26,587 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 571 selfloop transitions, 51 changer transitions 0/626 dead transitions. [2024-06-27 23:32:26,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 626 transitions, 10421 flow [2024-06-27 23:32:26,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:32:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:32:26,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 23:32:26,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 23:32:26,588 INFO L175 Difference]: Start difference. First operand has 438 places, 601 transitions, 9083 flow. Second operand 8 states and 144 transitions. [2024-06-27 23:32:26,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 626 transitions, 10421 flow [2024-06-27 23:32:32,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 626 transitions, 10229 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 23:32:32,535 INFO L231 Difference]: Finished difference. Result has 439 places, 606 transitions, 9041 flow [2024-06-27 23:32:32,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8891, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9041, PETRI_PLACES=439, PETRI_TRANSITIONS=606} [2024-06-27 23:32:32,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-27 23:32:32,536 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 606 transitions, 9041 flow [2024-06-27 23:32:32,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:32,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:32,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:32,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 23:32:32,536 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:32,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:32,537 INFO L85 PathProgramCache]: Analyzing trace with hash -460583047, now seen corresponding path program 1 times [2024-06-27 23:32:32,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:32,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490202861] [2024-06-27 23:32:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:32,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:32:34,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:34,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490202861] [2024-06-27 23:32:34,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490202861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:34,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:34,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:32:34,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396706049] [2024-06-27 23:32:34,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:34,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:32:34,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:34,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:32:34,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:32:34,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:32:34,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 606 transitions, 9041 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:34,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:34,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:32:34,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:36,991 INFO L124 PetriNetUnfolderBase]: 5471/8965 cut-off events. [2024-06-27 23:32:36,991 INFO L125 PetriNetUnfolderBase]: For 1138573/1138573 co-relation queries the response was YES. [2024-06-27 23:32:37,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77285 conditions, 8965 events. 5471/8965 cut-off events. For 1138573/1138573 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 62008 event pairs, 2203 based on Foata normal form. 1/8956 useless extension candidates. Maximal degree in co-relation 77069. Up to 8656 conditions per place. [2024-06-27 23:32:37,148 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 592 selfloop transitions, 25 changer transitions 0/633 dead transitions. [2024-06-27 23:32:37,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 633 transitions, 10707 flow [2024-06-27 23:32:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:32:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:32:37,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-27 23:32:37,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-27 23:32:37,149 INFO L175 Difference]: Start difference. First operand has 439 places, 606 transitions, 9041 flow. Second operand 10 states and 168 transitions. [2024-06-27 23:32:37,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 633 transitions, 10707 flow [2024-06-27 23:32:44,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 633 transitions, 10629 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 23:32:44,634 INFO L231 Difference]: Finished difference. Result has 445 places, 612 transitions, 9153 flow [2024-06-27 23:32:44,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8963, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9153, PETRI_PLACES=445, PETRI_TRANSITIONS=612} [2024-06-27 23:32:44,635 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-27 23:32:44,635 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 612 transitions, 9153 flow [2024-06-27 23:32:44,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:44,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:44,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:44,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 23:32:44,635 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:44,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:44,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1465970258, now seen corresponding path program 1 times [2024-06-27 23:32:44,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:44,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741592512] [2024-06-27 23:32:44,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:44,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:32:46,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:46,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741592512] [2024-06-27 23:32:46,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741592512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:46,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:46,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:32:46,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564130340] [2024-06-27 23:32:46,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:46,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:32:46,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:46,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:32:46,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:32:46,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:32:46,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 612 transitions, 9153 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:46,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:46,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:32:46,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:48,565 INFO L124 PetriNetUnfolderBase]: 5476/8974 cut-off events. [2024-06-27 23:32:48,565 INFO L125 PetriNetUnfolderBase]: For 1161956/1161956 co-relation queries the response was YES. [2024-06-27 23:32:48,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78147 conditions, 8974 events. 5476/8974 cut-off events. For 1161956/1161956 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 62119 event pairs, 2202 based on Foata normal form. 1/8965 useless extension candidates. Maximal degree in co-relation 77929. Up to 8676 conditions per place. [2024-06-27 23:32:48,715 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 596 selfloop transitions, 19 changer transitions 0/631 dead transitions. [2024-06-27 23:32:48,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 631 transitions, 10499 flow [2024-06-27 23:32:48,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:32:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:32:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 23:32:48,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-27 23:32:48,716 INFO L175 Difference]: Start difference. First operand has 445 places, 612 transitions, 9153 flow. Second operand 8 states and 139 transitions. [2024-06-27 23:32:48,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 631 transitions, 10499 flow [2024-06-27 23:32:55,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 631 transitions, 10386 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 23:32:55,852 INFO L231 Difference]: Finished difference. Result has 447 places, 615 transitions, 9154 flow [2024-06-27 23:32:55,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9040, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9154, PETRI_PLACES=447, PETRI_TRANSITIONS=615} [2024-06-27 23:32:55,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-27 23:32:55,852 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 615 transitions, 9154 flow [2024-06-27 23:32:55,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:55,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:55,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:55,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 23:32:55,853 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:55,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:55,854 INFO L85 PathProgramCache]: Analyzing trace with hash -460492837, now seen corresponding path program 2 times [2024-06-27 23:32:55,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:55,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239487358] [2024-06-27 23:32:55,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:55,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:32:57,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:57,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239487358] [2024-06-27 23:32:57,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239487358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:57,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:57,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:32:57,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759771640] [2024-06-27 23:32:57,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:57,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:32:57,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:57,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:32:57,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:32:57,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:32:57,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 615 transitions, 9154 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:57,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:57,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:32:57,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:00,408 INFO L124 PetriNetUnfolderBase]: 5473/8970 cut-off events. [2024-06-27 23:33:00,409 INFO L125 PetriNetUnfolderBase]: For 1167513/1167513 co-relation queries the response was YES. [2024-06-27 23:33:00,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78126 conditions, 8970 events. 5473/8970 cut-off events. For 1167513/1167513 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 62086 event pairs, 2202 based on Foata normal form. 1/8961 useless extension candidates. Maximal degree in co-relation 77906. Up to 8672 conditions per place. [2024-06-27 23:33:00,572 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 596 selfloop transitions, 19 changer transitions 0/631 dead transitions. [2024-06-27 23:33:00,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 631 transitions, 10436 flow [2024-06-27 23:33:00,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:33:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:33:00,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 23:33:00,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-27 23:33:00,573 INFO L175 Difference]: Start difference. First operand has 447 places, 615 transitions, 9154 flow. Second operand 9 states and 149 transitions. [2024-06-27 23:33:00,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 631 transitions, 10436 flow [2024-06-27 23:33:08,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 631 transitions, 10314 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 23:33:08,314 INFO L231 Difference]: Finished difference. Result has 450 places, 615 transitions, 9076 flow [2024-06-27 23:33:08,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9032, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9076, PETRI_PLACES=450, PETRI_TRANSITIONS=615} [2024-06-27 23:33:08,314 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-27 23:33:08,314 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 615 transitions, 9076 flow [2024-06-27 23:33:08,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:08,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:08,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:08,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 23:33:08,315 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:08,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:08,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1469689328, now seen corresponding path program 2 times [2024-06-27 23:33:08,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:08,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202293174] [2024-06-27 23:33:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:08,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:33:09,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:09,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202293174] [2024-06-27 23:33:09,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202293174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:09,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:09,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:33:09,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811139557] [2024-06-27 23:33:09,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:09,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:33:09,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:09,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:33:09,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:33:09,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:33:09,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 615 transitions, 9076 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:09,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:09,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:33:09,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:12,191 INFO L124 PetriNetUnfolderBase]: 5486/8988 cut-off events. [2024-06-27 23:33:12,191 INFO L125 PetriNetUnfolderBase]: For 1192102/1192106 co-relation queries the response was YES. [2024-06-27 23:33:12,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78503 conditions, 8988 events. 5486/8988 cut-off events. For 1192102/1192106 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 62196 event pairs, 2204 based on Foata normal form. 5/8983 useless extension candidates. Maximal degree in co-relation 78282. Up to 8646 conditions per place. [2024-06-27 23:33:12,349 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 576 selfloop transitions, 47 changer transitions 0/639 dead transitions. [2024-06-27 23:33:12,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 639 transitions, 11060 flow [2024-06-27 23:33:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:33:12,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:33:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 23:33:12,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 23:33:12,351 INFO L175 Difference]: Start difference. First operand has 450 places, 615 transitions, 9076 flow. Second operand 9 states and 156 transitions. [2024-06-27 23:33:12,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 639 transitions, 11060 flow [2024-06-27 23:33:19,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 639 transitions, 11010 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 23:33:19,494 INFO L231 Difference]: Finished difference. Result has 451 places, 624 transitions, 9342 flow [2024-06-27 23:33:19,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9026, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9342, PETRI_PLACES=451, PETRI_TRANSITIONS=624} [2024-06-27 23:33:19,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-27 23:33:19,495 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 624 transitions, 9342 flow [2024-06-27 23:33:19,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:19,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:19,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:19,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 23:33:19,495 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:19,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:19,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1469689173, now seen corresponding path program 3 times [2024-06-27 23:33:19,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:19,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944887322] [2024-06-27 23:33:19,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:19,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:33:21,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:21,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944887322] [2024-06-27 23:33:21,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944887322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:21,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:21,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:33:21,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451197380] [2024-06-27 23:33:21,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:21,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:33:21,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:21,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:33:21,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:33:21,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:33:21,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 624 transitions, 9342 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:21,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:21,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:33:21,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:23,988 INFO L124 PetriNetUnfolderBase]: 5491/8995 cut-off events. [2024-06-27 23:33:23,988 INFO L125 PetriNetUnfolderBase]: For 1211457/1211461 co-relation queries the response was YES. [2024-06-27 23:33:24,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79024 conditions, 8995 events. 5491/8995 cut-off events. For 1211457/1211461 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 62204 event pairs, 2203 based on Foata normal form. 1/8986 useless extension candidates. Maximal degree in co-relation 78802. Up to 8682 conditions per place. [2024-06-27 23:33:24,143 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 593 selfloop transitions, 31 changer transitions 0/640 dead transitions. [2024-06-27 23:33:24,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 640 transitions, 10702 flow [2024-06-27 23:33:24,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:33:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:33:24,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 23:33:24,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-27 23:33:24,144 INFO L175 Difference]: Start difference. First operand has 451 places, 624 transitions, 9342 flow. Second operand 9 states and 150 transitions. [2024-06-27 23:33:24,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 640 transitions, 10702 flow [2024-06-27 23:33:30,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 640 transitions, 10599 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 23:33:30,278 INFO L231 Difference]: Finished difference. Result has 456 places, 627 transitions, 9385 flow [2024-06-27 23:33:30,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9239, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9385, PETRI_PLACES=456, PETRI_TRANSITIONS=627} [2024-06-27 23:33:30,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-27 23:33:30,278 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 627 transitions, 9385 flow [2024-06-27 23:33:30,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:30,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:30,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:30,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 23:33:30,279 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:30,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:30,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1469694908, now seen corresponding path program 3 times [2024-06-27 23:33:30,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:30,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900636006] [2024-06-27 23:33:30,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:30,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:33:31,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:31,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900636006] [2024-06-27 23:33:31,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900636006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:31,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:31,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:33:31,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802121764] [2024-06-27 23:33:31,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:31,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:33:31,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:31,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:33:31,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:33:31,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:33:31,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 627 transitions, 9385 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:31,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:31,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:33:31,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:34,177 INFO L124 PetriNetUnfolderBase]: 5488/8991 cut-off events. [2024-06-27 23:33:34,177 INFO L125 PetriNetUnfolderBase]: For 1219897/1219901 co-relation queries the response was YES. [2024-06-27 23:33:34,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79681 conditions, 8991 events. 5488/8991 cut-off events. For 1219897/1219901 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 62171 event pairs, 2204 based on Foata normal form. 5/8986 useless extension candidates. Maximal degree in co-relation 79457. Up to 8650 conditions per place. [2024-06-27 23:33:34,334 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 577 selfloop transitions, 48 changer transitions 0/641 dead transitions. [2024-06-27 23:33:34,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 641 transitions, 10923 flow [2024-06-27 23:33:34,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:33:34,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:33:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 23:33:34,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 23:33:34,335 INFO L175 Difference]: Start difference. First operand has 456 places, 627 transitions, 9385 flow. Second operand 8 states and 144 transitions. [2024-06-27 23:33:34,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 641 transitions, 10923 flow [2024-06-27 23:33:41,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 641 transitions, 10751 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-27 23:33:41,062 INFO L231 Difference]: Finished difference. Result has 457 places, 627 transitions, 9315 flow [2024-06-27 23:33:41,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9213, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9315, PETRI_PLACES=457, PETRI_TRANSITIONS=627} [2024-06-27 23:33:41,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-27 23:33:41,062 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 627 transitions, 9315 flow [2024-06-27 23:33:41,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:41,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:41,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:41,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 23:33:41,063 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:41,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:41,064 INFO L85 PathProgramCache]: Analyzing trace with hash 138973488, now seen corresponding path program 4 times [2024-06-27 23:33:41,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:41,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673046985] [2024-06-27 23:33:41,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:41,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:33:42,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:42,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673046985] [2024-06-27 23:33:42,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673046985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:42,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:42,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:33:42,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884863019] [2024-06-27 23:33:42,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:42,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:33:42,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:42,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:33:42,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:33:42,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:33:42,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 627 transitions, 9315 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:42,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:42,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:33:42,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:45,016 INFO L124 PetriNetUnfolderBase]: 5501/9011 cut-off events. [2024-06-27 23:33:45,016 INFO L125 PetriNetUnfolderBase]: For 1245211/1245215 co-relation queries the response was YES. [2024-06-27 23:33:45,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80106 conditions, 9011 events. 5501/9011 cut-off events. For 1245211/1245215 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 62307 event pairs, 2202 based on Foata normal form. 1/9002 useless extension candidates. Maximal degree in co-relation 79881. Up to 8704 conditions per place. [2024-06-27 23:33:45,180 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 596 selfloop transitions, 33 changer transitions 0/645 dead transitions. [2024-06-27 23:33:45,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 645 transitions, 11265 flow [2024-06-27 23:33:45,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:33:45,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:33:45,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 23:33:45,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-27 23:33:45,182 INFO L175 Difference]: Start difference. First operand has 457 places, 627 transitions, 9315 flow. Second operand 8 states and 139 transitions. [2024-06-27 23:33:45,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 645 transitions, 11265 flow [2024-06-27 23:33:52,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 645 transitions, 11149 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:33:52,714 INFO L231 Difference]: Finished difference. Result has 458 places, 633 transitions, 9435 flow [2024-06-27 23:33:52,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9211, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9435, PETRI_PLACES=458, PETRI_TRANSITIONS=633} [2024-06-27 23:33:52,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-27 23:33:52,715 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 633 transitions, 9435 flow [2024-06-27 23:33:52,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:52,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:52,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:52,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 23:33:52,716 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:52,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:52,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1629168144, now seen corresponding path program 5 times [2024-06-27 23:33:52,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:52,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579148708] [2024-06-27 23:33:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:52,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:33:54,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:54,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579148708] [2024-06-27 23:33:54,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579148708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:54,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:54,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:33:54,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438927092] [2024-06-27 23:33:54,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:54,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:33:54,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:54,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:33:54,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:33:54,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:33:54,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 633 transitions, 9435 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:54,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:54,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:33:54,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:57,363 INFO L124 PetriNetUnfolderBase]: 5498/9007 cut-off events. [2024-06-27 23:33:57,363 INFO L125 PetriNetUnfolderBase]: For 1254564/1254568 co-relation queries the response was YES. [2024-06-27 23:33:57,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80025 conditions, 9007 events. 5498/9007 cut-off events. For 1254564/1254568 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 62242 event pairs, 2202 based on Foata normal form. 1/8998 useless extension candidates. Maximal degree in co-relation 79799. Up to 8701 conditions per place. [2024-06-27 23:33:57,499 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 594 selfloop transitions, 34 changer transitions 0/644 dead transitions. [2024-06-27 23:33:57,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 644 transitions, 10971 flow [2024-06-27 23:33:57,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:33:57,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:33:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 23:33:57,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-27 23:33:57,501 INFO L175 Difference]: Start difference. First operand has 458 places, 633 transitions, 9435 flow. Second operand 8 states and 137 transitions. [2024-06-27 23:33:57,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 644 transitions, 10971 flow [2024-06-27 23:34:02,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 644 transitions, 10775 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-27 23:34:02,845 INFO L231 Difference]: Finished difference. Result has 461 places, 633 transitions, 9313 flow [2024-06-27 23:34:02,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9239, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9313, PETRI_PLACES=461, PETRI_TRANSITIONS=633} [2024-06-27 23:34:02,845 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-27 23:34:02,845 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 633 transitions, 9313 flow [2024-06-27 23:34:02,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:02,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:34:02,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:34:02,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 23:34:02,846 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:34:02,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:34:02,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1629168299, now seen corresponding path program 4 times [2024-06-27 23:34:02,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:34:02,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135602675] [2024-06-27 23:34:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:34:02,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:34:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:34:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:34:04,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:34:04,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135602675] [2024-06-27 23:34:04,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135602675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:34:04,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:34:04,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:34:04,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114493360] [2024-06-27 23:34:04,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:34:04,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:34:04,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:34:04,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:34:04,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:34:04,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:34:04,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 633 transitions, 9313 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:04,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:34:04,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:34:04,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:34:07,673 INFO L124 PetriNetUnfolderBase]: 5495/9003 cut-off events. [2024-06-27 23:34:07,673 INFO L125 PetriNetUnfolderBase]: For 1262825/1262829 co-relation queries the response was YES. [2024-06-27 23:34:07,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79871 conditions, 9003 events. 5495/9003 cut-off events. For 1262825/1262829 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 62261 event pairs, 2202 based on Foata normal form. 1/8994 useless extension candidates. Maximal degree in co-relation 79644. Up to 8715 conditions per place. [2024-06-27 23:34:07,822 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 611 selfloop transitions, 19 changer transitions 0/646 dead transitions. [2024-06-27 23:34:07,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 646 transitions, 10679 flow [2024-06-27 23:34:07,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:34:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:34:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 23:34:07,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-27 23:34:07,823 INFO L175 Difference]: Start difference. First operand has 461 places, 633 transitions, 9313 flow. Second operand 8 states and 133 transitions. [2024-06-27 23:34:07,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 646 transitions, 10679 flow [2024-06-27 23:34:15,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 646 transitions, 10609 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 23:34:15,969 INFO L231 Difference]: Finished difference. Result has 463 places, 636 transitions, 9371 flow [2024-06-27 23:34:15,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9243, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9371, PETRI_PLACES=463, PETRI_TRANSITIONS=636} [2024-06-27 23:34:15,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-27 23:34:15,970 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 636 transitions, 9371 flow [2024-06-27 23:34:15,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:15,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:34:15,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:34:15,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 23:34:15,970 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:34:15,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:34:15,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1621810914, now seen corresponding path program 6 times [2024-06-27 23:34:15,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:34:15,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879704021] [2024-06-27 23:34:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:34:15,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:34:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:34:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:34:17,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:34:17,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879704021] [2024-06-27 23:34:17,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879704021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:34:17,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:34:17,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:34:17,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374701313] [2024-06-27 23:34:17,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:34:17,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:34:17,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:34:17,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:34:17,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:34:17,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 23:34:17,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 636 transitions, 9371 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:17,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:34:17,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 23:34:17,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:34:20,371 INFO L124 PetriNetUnfolderBase]: 5492/8999 cut-off events. [2024-06-27 23:34:20,371 INFO L125 PetriNetUnfolderBase]: For 1276754/1276758 co-relation queries the response was YES. [2024-06-27 23:34:20,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80484 conditions, 8999 events. 5492/8999 cut-off events. For 1276754/1276758 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 62195 event pairs, 2202 based on Foata normal form. 1/8990 useless extension candidates. Maximal degree in co-relation 80256. Up to 8709 conditions per place. [2024-06-27 23:34:20,531 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 609 selfloop transitions, 21 changer transitions 0/646 dead transitions. [2024-06-27 23:34:20,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 646 transitions, 10659 flow [2024-06-27 23:34:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:34:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:34:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 23:34:20,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-27 23:34:20,532 INFO L175 Difference]: Start difference. First operand has 463 places, 636 transitions, 9371 flow. Second operand 8 states and 133 transitions. [2024-06-27 23:34:20,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 646 transitions, 10659 flow [2024-06-27 23:34:26,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 646 transitions, 10505 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 23:34:26,446 INFO L231 Difference]: Finished difference. Result has 465 places, 636 transitions, 9265 flow [2024-06-27 23:34:26,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9217, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9265, PETRI_PLACES=465, PETRI_TRANSITIONS=636} [2024-06-27 23:34:26,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-27 23:34:26,447 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 636 transitions, 9265 flow [2024-06-27 23:34:26,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:26,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:34:26,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:34:26,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 23:34:26,448 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:34:26,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:34:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1787440101, now seen corresponding path program 1 times [2024-06-27 23:34:26,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:34:26,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177990157] [2024-06-27 23:34:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:34:26,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:34:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:34:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:34:28,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:34:28,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177990157] [2024-06-27 23:34:28,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177990157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:34:28,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:34:28,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:34:28,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694532972] [2024-06-27 23:34:28,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:34:28,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:34:28,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:34:28,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:34:28,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:34:29,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 23:34:29,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 636 transitions, 9265 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:29,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:34:29,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 23:34:29,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:34:32,461 INFO L124 PetriNetUnfolderBase]: 5660/9179 cut-off events. [2024-06-27 23:34:32,461 INFO L125 PetriNetUnfolderBase]: For 1498337/1498337 co-relation queries the response was YES. [2024-06-27 23:34:32,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84647 conditions, 9179 events. 5660/9179 cut-off events. For 1498337/1498337 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 62518 event pairs, 2271 based on Foata normal form. 2/9178 useless extension candidates. Maximal degree in co-relation 84418. Up to 8969 conditions per place. [2024-06-27 23:34:32,607 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 625 selfloop transitions, 19 changer transitions 0/648 dead transitions. [2024-06-27 23:34:32,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 648 transitions, 10633 flow [2024-06-27 23:34:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:34:32,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:34:32,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 23:34:32,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 23:34:32,608 INFO L175 Difference]: Start difference. First operand has 465 places, 636 transitions, 9265 flow. Second operand 8 states and 124 transitions. [2024-06-27 23:34:32,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 648 transitions, 10633 flow [2024-06-27 23:34:38,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 648 transitions, 10566 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 23:34:38,569 INFO L231 Difference]: Finished difference. Result has 465 places, 638 transitions, 9297 flow [2024-06-27 23:34:38,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9198, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9297, PETRI_PLACES=465, PETRI_TRANSITIONS=638} [2024-06-27 23:34:38,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-27 23:34:38,570 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 638 transitions, 9297 flow [2024-06-27 23:34:38,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:38,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:34:38,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:34:38,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 23:34:38,570 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:34:38,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:34:38,571 INFO L85 PathProgramCache]: Analyzing trace with hash -579072597, now seen corresponding path program 1 times [2024-06-27 23:34:38,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:34:38,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481789760] [2024-06-27 23:34:38,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:34:38,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:34:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat